A smoother, quieter AR-15? The SMB from Armaspec.

[@jamonrye]

Am I the only one that was worried about his beard getting ripped out by that buffer tube?

[@ghosthunter0404]

Nope I saw that and was wondering what type of person rests their face on a buffer tube with holes in it

[@tylerbrown8026]

That was my immediate thought when I clicked on the video 😂 that thing is a beard shredder 3000 no doubt!

[@jonboy9734]

@@tylerbrown8026the crease in my Magpul stock and buffer tube already rips the beard hairs out for me.

[@jasonyoungfitness7140]

Yup

[@TaddVentures]

1st thought lol

[@professional_larper]

*I'm pretty sure this is the first time we have all seen a skeletonized buffer tube*

[@adamjones7497]

I ran one for a week a few years ago back, in Arizona. In the Arizona desert. Yea… it did exactly what you’d expect in a dirty, dusty environment. - Skeletonized tubes are for safe queens, not service rifles.

[@wcarthurii]

Bout to say..... Probably the last one we're gonna see, as well.

[@ChrisMaher-g5l]

Of course that’s what you think, you probably don’t even run what you have on a regular basis

[@professional_larper]

@user-cv6tx6yq2b don't know why you felt the need to troll but 🤷🏻‍♂️

[@armedfarm3429]

@@adamjones7497 This is what I was going to say when I seen it today. No way in hell would I own I of these. The crap that would go in the tube, sand, dirt, snow, water, bugs & birdsh!t. Ya real smart.

[@slavikarlov]

Geissele braided wire spring and H2 buffer is perfect. Doesn't make your weird twang noise and it's supper durable.

[@TmansAquatics]

Just bought and installed that exact one into my ar with a binary trigger I’m gonna test here soon 🎉

[@lc634]

@@TmansAquaticssi did it work

[@WinnebagoBrewingCo]

@@TmansAquatics How was it?

[@michaelrudisill897]

For the guys still running a spring buffer. Throw some wheel bearing grease on the spring. It quiets it down by alot. Not the cleanest method, but very effective. I'm sure it there's someone that will day it adds friction and effects your gas system, but in my experience doing it, there's little to no difference. After 500 rounds with the grease on the spring, it maintains the smooth quiet function, but did start to seep grease at the back of the receiver. When I say seep, I mean it shows if you have your rifle painted. Not a glob oozing out. Nice little hack a gun smith showed me until you can upgrade your buffer. Give it a try.

[@jackwalker1361]

I use wheel bearing grease mixed with a low oil like 0w 20 or whatever you prefer but it beats paying top dollar for some name brand gun lube

[@seantf1414]

A lot of the sound of a stock buffer sprig can be mitigated by using some dremel paste and gun Lupe in the buffer tube and shoot for around 200rnds. It will clean up the machine marks in the buffer tube and quite it down.

[@ThePerpetualStudent]

thanks!

[@lindajohnson1687]

Thanks for the info

[@JR15A2]

Or just don't use a crappy buffer tube with machine marks.

[@seantf1414]

@@JR15A2, who makes this product, without machining inside the buffer tube? I promise you I have assembled more ARs than you could imagine. Nice try though keyboard warrior

[@JR15A2]

Sure, of course you have. I'm sure they were all "just as good" too. Any quality manufacturer can absolutely machine buffer tubes with a perfectly smooth finish on the inside, just like they're able to acheive on the outside. Nice try though keyboard couch potato.@@seantf1414

[@timpace9216]

I just got this installed and I must say, it’s an amazing upgrade.

[@stevenbarnes5220]

Can this system be weighted in multiple weights as some calibers and rounds may require?

[@timpace9216]

@@stevenbarnes5220 from what I understand from the concept you can get different weights and springs to get the feel you are looking for.

[@LordHolley]

​@@stevenbarnes5220 they offer different weights for different calibers.

[@bryanmasis1595]

@@stevenbarnes5220yes I think they provide some extra tungsten weights to fit your needs

[@yusriyahbagheri8843]

​@@stevenbarnes5220 yes they offer the full list of buffer weights. I have an H2 in my gun.

[@roguemodel]

Never gave my buffers a second thought, I will have to check it out.

[@humbertomedina86]

Applying a thin layer of lubricant to the buffer tube can significantly enhance its performance. Even a small amount of lubricant can make a substantial difference.

[@TheDkb427]

Wtf is with that skeletonized buffer tube!? Seems like a no go for a serious build and facial hair lol

[@FumiTheKitten]

Gas in the face.

[@Marcus2750-u1t]

Its just to showcase the spring…. Sheesh

[@controlledchaos8851]

@@Marcus2750-u1tright ?!?

[@LevelUpTrucking]

It’s still cool af

[@gedeondumesyeux2259]

Free shave 😂

[@ruckuswethepeep4384]

Thank you! I installed one of these and put spring back in and it would fall out!!! You are the first one to tell me you don't need it! That is one of the reasons I buy a bunch of shit from you guys👏

[@Ih8liarsandusers]

You can clearly see in the video that they arent using it.

[@mobilegamersunite]

LMFAO 😂 bro!

[@mannysoto5583]

I have one in each of mine inclding myy AR10, FANTASTIC!

[@matthewschmitt2454]

Was planning to upgrade my buffer system to a captured buffer, I'm glad I came across this! This system seems to be the best of all of them. Thanks for putting this out, I'll purchase for all my ARs

[@derekturner3272]

What makes it the "best of all of them"?

[@matthewschmitt2454]

@@derekturner3272 these don't have the failure points you'll get from JP and other captured buffers, as they don't have the o-rings between the buffer weights that eventually wear down. The entire system is held together with a tension pin, instead of a screw with loc-tite, so recoil shouldn't affect it over time like in the JP's. All around I feel this is a better system design 🤷

[@derekturner3272]

@@matthewschmitt2454 Thanks! I've made all mine, and when I see a cool new design, I often machine something up to get a better look at it. The orings and "loose" weights on the JP system provide some "hysteresis" that some say is good/needed. But so far, I've heard no compelling argument that gains my agreement on that point. I, like you, don't like betting my life on Loctite. So, any design that removes failure points is all goodness.

[@matthewschmitt2454]

@@derekturner3272 I agree, to take a basic buffer and spring system that works, and voluntarily add failure points, probably isn't the best decision. However, this system is what I was waiting for 😉

[@weezem]

​@@matthewschmitt2454 I've never had an issue with the JP enterprise buffer assembly. You act like replacing o-rings is an expensive and hard thing to do. You just sound like a lazy person who doesn't take care of their stuff if you're crying about o-rings needing to be replaced. That screw has never backed out on me either in both an AR-15 and LR-308 platform.

[@jonathanclark6652]

Been building firearms with DTT parts for years. Great quality, can't beat the prices!

[@RobertGalin-dw3nj]

Experimentation with different ideas is great, as long as safety isn’t compromised.

[@DeltaTeamTacticalMedia]

We agree. Safety is important.

[@TacticalBuffoonary]

I have the version 2 in all my ar15’s and Ar .308/6.5’s. They are super quiet and smooth. This is much cheaper than buying overpriced Jp buffer set ups.

[@MRD0889]

Have you have issues with the 2 stage ? Mine hit the 1k rounds and started giving me failure to feed, causing my bolt to chew the brass lol. I swapped out to my standard buffer system < I always keep in My rifle bag> And bam back in action ate and spat the brass with no problems. When I got home I took the 2 stage apart and cleaned it up, wasn't that dirty to be honest. But I know there's more parts moving in between so that could cause a failure.

[@TacticalBuffoonary]

@@MRD0889 I would replace the springs’ they are a consumable part. In my particular case’ all my Ar’s including my Ar .308/6.5 have lightweight titanium bcgs and adjustable gas blocks so my recoil is less and so is the reciprocating mass. I have over 1k thru my 10.5 with an frt 15 and 1k thru my 16” ar-15 and my .308 AR. I do have spare springs for all the parts for all my rifles and hand guns including springs for my armaspec buffers. I do have standard buffers and buffer springs too. I bet your springs are weak and need to be replaced’ they are consumable parts that don’t last forever. Ill keep a close eye on mine to see if they start to fail to feed but right now they seem fine.

[@MRD0889]

@@TacticalBuffoonary damn tho .. 1k rounds and springs just fail 🥲 I run a bootleg BCG, when I'm not running suppressed I eject nicely 3 o'clock and when I'm running it with my Wolfman I switch it to S for full suppressed to let them gasses out. I eject almost 4 o'clock. I mean I'm gonna give it another 200 round run next weekend, if it truly is the springs and not just the light grime, I'm gonna have to go back to boring noisy spring and buffer 🙃🙃 But yea keep an eye and let me know if you get any weirdness out of them after 600 ish rounds

[@Gunsmith67]

You can pay for quality.. of you can buy crap. Always your choice man.

[@peytonmacdonald6295]

@@MRD0889 I run a 10.5" 7.62x39 carbine AR pistol with the 2 stage Gen 2 H3 Armaspec rn but before I was using that I had the Geisselle Super 42 braided spring with an H2 buffer. I didn't particularly care for a quieter action, I wanted the 2 stage system to reduce that heavy recoil from the buffer bottoming out, and i wanted more reliable feeding. I'm gonna have to do some more shooting with it but the difference in felt recoil is really noticeable. However much like you, I immediately noticed it caused more damage to my brass, it almost shows signs of increased pressure on the rim of the cartridge which is really strange. I think this issue would be solved by armaspec simply making a stronger spring available to replace the first "stage" long spring. Now, I'm also using an enhanced extractor/bcg, so I may just have too much tension on the casings but I'm not sure..

[@DragovsSly]

These are amazing, I bought this buffer to start a circumcision business.

[@jasonransdell1647]

I have the previous gen 2. I absolutely love it. It makes a big difference. I bought all of the individual weights so I can tune my AR for several different scenarios. The weights were $10 ea.

[@LowBudgetYoutuber]

I'm new. Why would you have different weights for different situations?

[@sciji3118]

​​@@LowBudgetKZbinridk if anyone answered you so I'll try, the biggest thing is reliability which is assured by most companies by making the weapon over gassed on purpose, this means that it can also cause damage over time and the way you tell if it's overgassed is the ejection pattern. Ejection pattern is when firing the cartridge case is ejected and bounces off the deflector behind the ejection port, if it's bouncing off more forward of the ejection port than 3 o clock to 430ish o clock it's overgassed which can be mitigated by adding weight to buffer. If cartridges are bouncing off the deflector behind the 3 o'clock position it's likely under gassed or you should lower the weight in the buffer until it's at 3 o'clock position otherwise it's gonna take more than weight. Everything you could ever really learn without doing the things with the things can be learned right here on YT so you're in the right place so do your research and enjoy tinkering. Also, the best buffer system for the money I've seen so far is by strike industries it's a kit that comes with everything and they sell upgraded springs too if I'm not mistaken.

[@LowBudgetYoutuber]

@@sciji3118 Wow. I learned nothing. I realized these all made in the time of War to the lowest bidder and then fifty plus years later all the legislation and you cannot change a simple part without creating a Felony. Fast forward to now this good for them if it jams, misses or explodes. After typing that I realized pry inside job so we all not all wearing a legal motion activated voice controlled shoulder fired mini gun with chemical bullets.

[@LowBudgetYoutuber]

@@sciji3118 Simple question from a simple mind. I was thinking you would say weights change depending on type of ammo and if using a suppressor for proper feeding. Also why cannot it be contained in a Soundproof or Liquid butt stick? Also what is the exact amount of gas needed to cycle and where is bleeder like valve to throw away extra gas and not cause further wear and tear. You know them, I Dream of them. However nothing like Modern. I see the Future.

[@LowBudgetYoutuber]

@@sciji3118 Also why cannot we have a Digital Spring in Butt stock for change on the fly also would love to see Electric Paintball Trigger to replace them all. Just a Dreamer. Nothing is Ok, it is old.

[@Peetabread555]

Was planning on going with the unrivaled deadblow system but the duty one is always sold out, glad to see other similar buffers, might have to grab one of these

[@XDgreatmoment]

The buffer weight on these is 1 solid piece and the difference between this compared to JP’s loose buffer weight is the JP design reduce carrier bounce.

[@I_NeedToGetOffThis_App]

Could you explain this a bit more? I'm deciding between this one or the JP's. Thank you.

[@stephen_crumley]

@@I_NeedToGetOffThis_App watch 3:51 through 3:55 and pay attention to the very end of the buffer cycling forward and you’ll see the bolt “bounce” when it chambers the next round. The JP assembly inhibits bolt bounce, having a solid buffer weight keeps you from being able to stop bounce

[@I_NeedToGetOffThis_App]

@@stephen_crumley thank you

[@michaelnyden8056]

Bolt bounce doesn’t matter and does nothing on a semi AR, only full auto which doesnt apply to most of us I would think

[@dogevanzandt2889]

​@@michaelnyden8056jp system is still a better system, cope.

[@wooddawg4868]

For me, any firearm I have must go bang. With this buffer system, it seems nice and smooth but my original buffer and chrome silicone spring feels great, more importantly, it works and cycles.

[@snagglesmagoo2750]

I just bought the one for the 9mm. I wish I'd known beforehand that the weight has to be removed from the BCG. Put a kink in my joy of installing it. I really like the Beach Bash '44 Tee. Very cool.

[@glennwest267]

Does it help recoil?

[@dustin2134]

​@@glennwest267i came here to ask the same thing

[@raymondklieber6475]

I like the non-contact of the spring aspect of the system. Any parts that mitigate direct contact are always akin to longer life.

[@KyleAKG]

Just watched this and ordered one for myself, I can't wait to get it installed!!

[@kentsmith6063]

The new upgrade looks like a good improvement

[@danielescobar7618]

I just wish there was a full rifle length travel one. Might have to turn one, looks simple enough to modify

[@dukeblue2573]

Looks like a great improved upgrade for better and smoother working.

[@HighRoad317]

The first time I shot my old Bushmaster I was sure it was broken, glad technology has caught up!!

[@JenkinsStevenD]

I just bought a JP silent capture spring. Might have to go this route for the next rifle's upgrade so I can compare.

[@TimMayville]

The only issue I ran into was this. A POF 7 position buffer tube. I didn't realize it's just a little longer. So, the 308 version would drop to far in. What I did. Cut some buffer spring coils , just enough to full the gap. welded 2 washers to the spring. Placed it in first and then the armspec buffer in and locked it in. It let's the entire process smoothly work and doesn't bottom out...

[@Ww-dl7vr]

What the fuck.......

[@mslynn1982]

This is definitely quieter than most AR-15's. I'd like to try it out at the range

[@bkillz33drift]

literally went to check out this system and came across that you guys are doing a give away pretty awesome man

[@meuls82]

1Does this aid in your AR shooting flat, like the JP Enterprise silent buffer system? Please respond!

[@danefuentes3877]

Just bought the SMB Gen3. Although it DOES eliminate the annoying“twang” you get with a standard buffer spring, it is EXTREMELY difficult to remove from the buffer tube. The hammer is in the way and you have to force it out pretty hard. Still not sure I’m keeping it but it works fine.

[@trevishornsby7385]

By hammer do you mean buffer detent?I want to buy one but really don't have the time for the bullshit just to get the twang to go away...

[@danefuentes3877]

⁠​⁠​⁠No, I’m referring to the hammer that strikes the firing pin. The detent is an inconvenience at most. But due to the fact that the SMB is a solid steel rod, it doesn’t bend out of the way the buffer and spring does. You can kind of see it in this video @1:45. In the video, the SMB buffer is resting on top of the hammer. However, once it is installed, when you try to remove the SMB, the bolt-side face of the SMB buffer rests against the back of the hammer when it is cocked and it takes some serious elbow grease to get it past the hammer. Uncocking the hammer doesn’t help either because then it just becomes even taller.

[@carterm3301]

Well big dog I guess that’s true but as long as you don’t have a dimpled backing ring you can also just back out the buffer tube which I guess would take more time but could be less of a headache.

[@loviticuss]

😅 or you can just press the hammer down it has a small amount of travel left in it and it's plenty to pull out the smb

[@danefuentes3877]

@@loviticuss I have an aero precision lower and that is the first thing I tried. Not enough post-travel to allow the SMB to come out of the buffer tube. The buffer tube is almost in line with the top of the lower receiver. If YOUR hammer goes down far enough to let the SMB out of the buffer tube, something is probably broken. WIth all due respect, do you actually own an SMB, or are you just spitballing here? So far, I've decided to keep it in but it's still not any easier to remove. It's not something I clean that often anyway so it should be fine.

[@AtomkeySinclair]

Watching the intro... I winced for the man's mustache and beard.

[@viviv1000]

Hey man. To each their own. Jesus is always pictured with similar facial hair Himself

[@Im0utlaw]

Thanks for this! Didn't know about these until now. Just ordered the Gen4 SRS from Armaspec

[@wheezzl]

What's the difference between the SRS and the SMB?

[@kentsmith6063]

Looks like a nice improved buffer system

[@thomthompson9217]

Similar to the JP Silent capture system. I have the JP on three of my rifles. This type of buffer system greatly reduces the noise inherent in AR-15 & AR-10 operations (as well as smoothing the buffer cycling). I wouldn’t build another AR platform rifle without the JP Silent Capture System or the Armaspec SMB.

[@paulfrederick9339]

Very informative. Opened up new info here.

[@samozary]

I have an SMB-H in both my AR 15 (5.56 mid length 16" barrel) and Banshee 9 mm. Smooth quiet action and noticeably lighter recoil in both guns. I ordered direct from Armaspec. I wouldn't order from Delta Team. I've seen to many bad reviews and complaints. Armaspec took 2 1/2 weeks for delivery. kind of to slow for me.

[@jarheadhoss499]

If you leave the buffer retainer pin in there it's a pain to remove. I have one in an Aero AR 18" rifle length gas with a Miculek compensator. There is no movement in the barrel when shooting.

[@matthewreese6367]

I love the cutaway buffer tube. Does gas get out of it?

[@cll1205]

I wonder how much of a difference it would make on a suppressed 300blk

[@asassin7_pr135]

great information I have that buffer I would be interested in the tube where I can get it, it is customized thanks

[@Ww-dl7vr]

Get a vltor buffer tube...

[@animeplusmore]

Who makes that buffer tube

[@richardgreen3101]

The video makes replacement look very easy.

[@kasb58]

DO you know if this was changed? On the Armaspec website the gen 3 smb looks completely different.

[@tzurachienu]

Would it be a whole new area to clean?

[@mikedrabandt4435]

Like the smooth super quiet buffer system

[@Fabyfakid]

Just got one to be able to use my rifle without the buffer retention pin, without parts flying out.

[@edkeck3919]

I never noticed the sound of the spring. After watching this I can’t unhear it. 😂

[@cjspaar2090]

It works great! Quieter suppressed and smoother impulse...

[@jamespena1793]

Gonna have to check one out

[@VisceralConstruct]

I have 2 of the Gen 2 versions. Those work perfectly. I’m definitely going to be trying this out.

[@bonesely9858]

What are the failure points of it? About how many rounds have you have you fired? Are you keeping the guide rod and spring oiled? Are you shooting suppressed?

[@Kenny_F_N_G]

How would that work with a fos tech binary trigger?

[@LeonardoOrellana-zq5wt]

What model I should use on my AR15 16inch barrel chamber on 556? Will love to swap the buffer and the noisy springs

[@ScrapyardSentinel]

How is this for an under-gassed AR15?

[@Baltimoreed]

The Tubbs flat buffer spring is also quiet and a lot cheaper. Also smoother as by being flat it has more coils. Have flat buffer springs in all of my ARs. No noise.

[@ARP_king5.56]

Where can i get that buffer tube

[@Renrondog]

Looks like a very nice product. Personally I like the sproing sound. I'm more concerned about the noise from the other end. Still a nice product.

[@allisonsmith9050]

How is gen 3 different than 4? I ordered the 4th gen a few days ago and I hope I’m not disappointed. $95 was a tad more than I wanted to spend, but if it works, it will be money well spent.

[@dennisrael1716]

I like the setup But when the Bolt returns you can see it through the Slots on the stock It looks like it would be Weak Metal.

[@jimturic9782]

If and when I decide to upgrade I'll take a closer look at this. How does it effect felt recoil?

[@richardgreen3101]

This is a great upgrade to install on your rifle!

[@matthewfeuge8387]

This is phenomenal, I need one right away.

[@JamesHanson-w5j]

I got a couple of questions. Please excuse me if I missed it in the video. 1) Are these mil-spec or commercial parts? And more importantly!! 2) Where can I get a buffer tube like the one in the video!?

[@murraychapman3958]

Like the idea of quiet buffers

[@jackwalker1361]

Is this all one weight or do you have different weight options im just starting the video but was curious like the h2 is like 4.6 ounces do you have options

[@robertwilkinson2293]

As an AR user since the 1970's the twang never bothered me.

[@TeensierPython]

Does when you get into suppressing your rifle. Or if you switch to something like this. Then you don’t want to go back.

[@rid3withthewindvaj131]

Armaspec should make different weight springs so we can fine tune our ar platform like the JP.

[@jasonransdell1647]

They do make and sell them. I bought every weight. I have them all. 3 or 4 in total.

[@Ih8liarsandusers]

They clearly show on the website what to do with the spring to fine tune it a quarter pound at a time. Pay attention.

[@michaelnyden8056]

@@Ih8liarsandusersweird though because according to everything I read online, cutting or shortening a spring actually increase it’s effective spring rate and does not make the spring softer.

[@justgonnastay]

​@michaelnyden8056 It reduces the preload. I'm not sure the effect that has on this system though.

[@joelvanallen6562]

This doesn't work with a law tactical folder does it?

[@danaoneal1]

Which weight should I use with my 300 blackout, 10” SBR, pistol length gas tube?

[@TeensierPython]

Lots of bounce when closing. Needs more deadblow action on close like the stock buffer.

[@brianleabo6295]

Is this the jp enterprises buffer ? Or another company? If so witch is better?

Are you running a carbin gas system or a mid length??? I’m interested in getting the H2, which is 4.7 ounces but I see some people with lighter and I see some people with heavier. I want to know what’s best for a mid gas system 16 inch barrel.!!!

[@ghosting08ghost51]

Man this is awesome. I love this product. Definitely would love to buy this.

[@Grizzly406]

Hmm a skeletonized buffer tube… bet that got weaker with those cuts.

[@ChargerusPrime]

How does this compare to the JP silent captured buffer system?

[@ronaldprovencher7570]

What buffer is the best for a 9mm direct blow system ? with a 16" inch barrel ?

[@dabohmg1073]

Is ths compatible wit a folding stock

[@SmedleyButlerII]

This one looks like it may even be better than the JP one. This appears to not have any rubber O rings, which ends up being a failure point on the JP every few thousand rounds. Does anyone have any first hand experience of the long term reliability of this?

[@gameingextensions7857]

I’m at least 2500- 3000 rounds deep on the G2. I’m starting to think about replacing the spring, but no issues. For the price I prefer this to the JP.

[@gameingextensions7857]

I should add that I have a jp on one of my other rifles and it is great but the I rings do get chewed up after a thousand rounds or so.

[@louisGauto]

these really make the weapon smooth and make any feel premium, add a rise drop in trigger and this into a cheap AR and wow

[@Ww-dl7vr]

And wow it's still cheap and you should have spent the money on a better trigger

[@lawrencebegay8484]

What is brand name for the buffer tube? I think will try this out on my ar. Great video.

[@yodaddy82daddy70]

Right in title of video my man

[@stevenbarnes5220]

Can this system be weighted in multiple weights as some calibers and rounds may require?

[@stevenbarnes5220]

I visited their web-site and Armaspec has all the standard buffer weights available. The answer is Yes They Do

[@nathanwebb4671]

Is the weight adjustable?

[@GeeDeeBird]

Do you know if I will need a spacer when putting this in a pistol buffer?

[@Serenityindailylife]

I have the 2nd genius quieter but the stock spring will outlast the armaspec. It uses 1911 springs.

[@TheBarefootedGardener]

I found it it’s not too bad with carbines, however, that would be really really cool in fixed stock rifles.

[@johnecrouch2671]

A pretty simple upgrade for quieter, smoother operation

[@jabe9228]

Can I keep the retainer pin in? Would it damage the face of the buffer?

[@MrChrisham]

@deltateamtactical does this help with gas blowback?

[@5.56x45NATO]

If you can hear your buffer twanging when you shoot you got pretty good hearing.

[@fcpraesidium]

Cool; I wasn't aware of this, thanks.

[@jamesgraham828]

What spring would you use for 7.62x39?

[@denden3221]

Will this work with a A5 tube

[@brucefoley1658]

So where do you buy this?

[@kevintowell415]

Interesting I'll take a look at this upgrade.

[@davidlane9120]

Wild looking buffer tube.

[@wheezzl]

What's the difference between this and the SRS they have on their site? Is that one just newer? Couldn't tell from the info on their site

[@justgonnastay]

Will this work with a rifle buffer tube? And what weight would you use in a rifle?

[@victorortega2718]

For just a direct replacement for a milspec ar15 what size/weight do i need to pick?