I believe only MP5 and GRS have normal weight charging handle. The rest is heavy, right?
@user-sb1st6fi6u3 күн бұрын
Pretty sad U Boob we have to take crazy practices to post video of Freedom tools .Thank for all the information. I may get this for my 16" Bronze Buster
@danielhess393 күн бұрын
Kewl comparison 🤩
@allthingsconsidered32113 күн бұрын
A roller is a bearing, a roller bearing… really they’re all bearings
@markrippt46773 күн бұрын
Another great vid! Is that the Scheel Gen 2 system? And is it in an A5 length tube? A like and share from me, as always.
@Blowback93 күн бұрын
Gen 2, A5.
@ZChaosFactor2 күн бұрын
They sell it with a carbine tube as well
@Gunner-ll1zd3 күн бұрын
You had me at the hk slap. Ergos are horrible though
@Blowback93 күн бұрын
The "Navy" trigger housing (shown) helps a lot with ergos. Not great, but better.
@scottc30293 күн бұрын
The wall was blocking half of the show. Is there a reason you can't move away from it. Or set up the camera on the other side?
@Blowback93 күн бұрын
Huh. I didn't notice. I'll have to look into that. 🙂
@ToneEasy3 күн бұрын
The Scheel really sings when you run lower pressure loads through it. Try setting it up with 147gr subs next time!
@joed32643 күн бұрын
Wrong. I have the Maxim and the " Gentle Recoil" system. I used the tungsten weights instead of two lighter weights which requires a longer buffer tube. I run a $1 5.56 carbine spring. No need for a flat wire spring. I shoot much heavier bullets. Shot a MP5 today using 115 grain factory ammo vs my Maxi system with my 150 power factor 147 yr bullets. Recoil was identical. You must not reload. Btw you need to spend some time in the gym to build up some muscle. I have no problem cocking the Maxim with a regular charging handle. You should do your tests with the same length barrels.
@joed32643 күн бұрын
Grain not yr.Darn spell check.
@ZChaosFactor3 күн бұрын
No flatwire spring isn't needed. It's smoother and doesn't twang like a round wire spring. It's a review so letting people know the maxim is harder to charge than a regular Ar15/ Ar9 is part of a good review. Yes heavier bullets have less felt recoil. But 115gr range ammo is still what most people use and is a fair standard across the board. Did you really claim the maxim with your handloads is as soft as the mp5 with factory ammo?? I mean no duh.
@joed32643 күн бұрын
@@ZChaosFactor What part of "I shot both today at our range" did you not understand? Several of my friend's were there and also shot both. Don't be a moron. Not becoming. I have been shooting in competitions longer than you have been breathing. Now run along little boy.
@Blowback93 күн бұрын
Lol.
@joed32643 күн бұрын
@@ZChaosFactor I just made all of this up because I wanted to impress you - not. I have been shooting in competitions longer than you have been alive. I mean yes duh.
@joemizer3 күн бұрын
Would you be able to review the extar ex9. It shoots like a dream. I would like to hear your thoughts on it and how it compares to your builds. Thank you
@SenseiLlama3 күн бұрын
Its just simple blowback right? the one I shot didn't seem anything special.
@markrippt46773 күн бұрын
@@SenseiLlama Sub 500 bucks. Requires no lubrication, ever. Has an odd little rubber buffer in the rear of the buffer tube that flexes into a cavity. Simple and elegant.
@SenseiLlama3 күн бұрын
@markrippt4677 seemed like decent enough firearm when I shot it. I don't know if I would describe it as shooting like a dream. I shot one of the cmmg 9s and holy cow.
@dbmail5453 күн бұрын
My Kynshot buffer binds in both my flat wound buffer springs. Any suggestions?
@Blowback93 күн бұрын
Which flat springs? I tested 15 of them. The Tubb, AR Stoner, and Spinta are all the most loose and have good characteristics. blowback9.wordpress.com/2023/03/03/flat-wire-spring-comparison/
@michael9r9rsBlasters3 күн бұрын
Great vid, I haven't actually heard of the scheel before so this was really interesting to see
@Metalgearmadness3 күн бұрын
So I actually talked to maxim defense on how to setup the RDB, they said to put it in the tube and tighten it up (with no plunger or spring) until it touches the bolt. It should be in contact with the bolt. So it kinda has a tiny bit of preload. Other than that I found it didn't really change much versus installing it with a gap and using the plunger and spring to lock it in.
@Blowback93 күн бұрын
Thanks for the info! I'm surprised they don't provide instructions and a few shims.
@Metalgearmadness3 күн бұрын
Yeah I dont remember seeing anything on installing it so eventually I just called and asked. it makes sense though because you don't want any sort of gap if you want to prevent bolt bounce. Essentially this way it acts as one continuous system.
@Lord_Fried3 күн бұрын
Doug, is the MP5 system proprietary? I’m just curious as why it’s not used in other PCCs
@strohausii3 күн бұрын
Not a simple nor inexpensive solution. It is actually used in principle with the JP RDB, and gen (v) 2 stribog.
@ZChaosFactor3 күн бұрын
It's used / copied/ mimic in a couple other PCC's but it's not cheap or simple to design / build.
@Blowback93 күн бұрын
What they said! It's not proprietary, but it's tricky and expensive to implement. The HK German engineers did it right and balanced the forces of their system very well. A few others use the same principles, but it never seems to work quite as well. I only wish it had LRBHO!
@Lord_Fried3 күн бұрын
Thanks for the responses!
@strohausii21 минут бұрын
I forgot to also mention the patent had long ago run out, very good clones exist, one actually made with the same machines.
@bayouromanian3 күн бұрын
Excellent video. I recommend comparing these with a good heavy buffer regular blowback option as well
@newyoutube62823 күн бұрын
The options tested already included the best blowback buffer recipe: the gentle recoil system. A heavy buffer might be the same weight as the GRS but will often bounce (unless it's a heavy buffer with a sliding weight that counters the bounce). The hydrolic dampener in the GRS does this and prevents bolt bounce.
@ZChaosFactor3 күн бұрын
Its already been tested before. All these setups blow the good old heavy blowback out of the water. We there's nothing to be gained from comparing them. Like was mentioned the GRS is an extra heavy direct blowback except with a hydraulic buffer.
@hellofederalagent89793 күн бұрын
I just recently switched from an 11oz buffer to the grs and it is significantly better way less jumpy
@Blowback93 күн бұрын
What everyone else said! The GRS is the step-up improvement I came up with over just a heavy 10-11oz. buffer. A heavy buffer definitely helps, but adding the hydraulic impact cushion component and a flatwire spring makes a big difference.
@bayouromanian3 күн бұрын
Thank you. I find your videos to be very informative, thank you for sharing. Does the hydraulic buffer compress when the buffer hits the rear of the buffer tube or before it starts sliding back?
@bayouromanian3 күн бұрын
Does the spring in the "buffer head" compress before the buffer slides rearward or when the buffer hits the back of the buffer tube before charging back forward to chamber the next round?
@Blowback93 күн бұрын
First one, then the other.
@harveymanfrantinsingin73734 күн бұрын
How would you compare the recoil reduction of the maxim to a JP silent capture buffer?
@Blowback93 күн бұрын
The silent capture buffer should be the same as just adding mass. The Maxim has a mechanical delay. The JP does not.
@harveymanfrantinsingin73733 күн бұрын
@@Blowback9 I see. Thanks for the info, and thanks for being dedicated to your passion/obsession! Lol
@poniccalichronic5 күн бұрын
Keep in mind your length of pull folks.(ie ar-pistols) The three letter bois are always looking for a new canine to shoot. If you dont know about lenght of pull you need to research.
@Blowback93 күн бұрын
I can't find "length of pull" anywhere in the NFA or GCA as passed by congress. SCOTUS recently killed Chevron deference. Food for thought. I am not a lawyer, this is not legal advice.
@jusbrowsin34566 күн бұрын
Great video thanks for the information
@Mil-Spec_Mike6 күн бұрын
I am running an Aero EPC receiver set and had an issue with the bolt locking back with 1 round left in the mag. After switching to one of Rudy's 5.5 "guaranteed to feed" barrels, no issues. I am also running his bolt and buffer with a flat wire AR15 buffer spring. Interested to see if you find different results. But Rudy's barrels REALLY seem to help. Even runs HST 147 JHP like butter. Great content as always!!!
@michael9r9rsBlasters6 күн бұрын
Thanks for your continued work! Seems like hydraulics are definitely the way to go if you have the coin to spare.
@joed32646 күн бұрын
You guys must be really weak.I am 75years old. I have zero issues pulling back a regular charging handle.
@Blowback93 күн бұрын
That must be it. Lol.
@wisco_guy6 күн бұрын
What is the total weight of reciprocating mass(bolt & buffer)? I’ve been using the KynShot RB5015 (21.5 oz) with a Wilson Combat spring in my SA Saint Victor 9mm with great results. No jams and perfect ejection.
@Blowback93 күн бұрын
14.7 bolt + 11.5oz. with the 5.5oz. K-SPEC and tungsten weights, similar to the original Gentle Recoil System. The K-SPEC doesn't have as good impact cushioning as the hydraulic buffers and doesn't perform well with this much mass. BTW, mass and springing in a blowback has little to do with jams and ejection. Those are due to the mag feed angle/height and the ejector position relative to the bolt.
@joed32646 күн бұрын
I just cut four slots in the OD with a 1/16 cut off wheel.
@joshalabat12666 күн бұрын
I've just built my first AR9 from following your posts. Great stuff! Haven't gotten the chance to shoot it yet, but it has a KAK K-SPEC 9.5oz Buffer with the KAK Tungsten Bolt Weight on the standard carbine tube to get to 26oz. Any opinions on this? I'm just wondering if I'll run into any problems running the carbine tube.
@jn710004866 күн бұрын
Post how it goes
@joshalabat12664 күн бұрын
Just shot about 200 rounds through it. Very fun to shoot. Works fine, but unfortunately I haven't shot an AR-9 before so I don't have a frame of reference to recoil difference.
@jacktaylor81076 күн бұрын
For the EPC, are you using an EPC upper/lower set or just the EPC LRBHO Upper? I switched to a Ballistic Advantage 8" and the feed cone have executed flawlessly with the G17 magazines. Current setup is a 10oz KVP tungsten buffer, standard spring, Foxtrot Mike Products BCG, and a very slightly touched pin from the LRBHO EPC upper (crimped less than a mm). Have not had issues with feeding yet but will comment if I get something weird or the jams come back. As always, LOVE, your videos. Such a fun hobby man, wish there were more dudes around like you to brainstorm with and try stuff out!
@Blowback93 күн бұрын
I have the EPC upper/lower set and a bunch of different non-enhanced feed cone barrels just for experimentation, but I think I found the problem. The LRBHO lever was pressing on the follower 1 round early, causing the follower to dip the nose of the last cartridge.
@MeMadeIt6 күн бұрын
Appreciate the experimentation! 👍
@Noggles106 күн бұрын
Would you say the kynshot 5000hp in a carbine tube with those weights would feel similar to the traditional GRS? After finding your site and the GRS a friend added it to his ar9 that he always hated shooting and it immediately changed his mind and also has lead me to building my own. I just would like a shorter buffer tube if possible.
@Blowback96 күн бұрын
Yes the feel is very similar to the original GRS. I'm working with a company to make tungsten weights specifically for the AR9, but it's a little way off yet. This is all just proof of concept.
@Noggles106 күн бұрын
@@Blowback9 I look forward to that possibility! Thanks for all you’ve done for this section of the hobby!
@vincefasano18176 күн бұрын
How about a 10oz deadblow kak buffer and one 3oz weight?
@Blowback96 күн бұрын
That would only add mass. It's missing the buffer impact cushioning that helps make the GRS work.
@vincefasano18174 күн бұрын
Understood - based on your experience does the added mass improve the shooting experience through less perceived recoil? Clearly not to the same degree as the GRS, but a small improvement to a standard buffer system?
@Blowback93 күн бұрын
@@vincefasano1817 Yes. More mass does improve felt recoil by slowing the action and distributing the recoil impulse over a longer period of time.
@malakithefolf696217 күн бұрын
With the 4" buffer what length buffer tube do i need
@Blowback93 күн бұрын
Standard carbine buffer tube with a 4" buffer and 9mm bolt.
@RaulPerez17 күн бұрын
I appreciate the website and related videos you put out Sir! I was having issues with my recent 9mm PCC build with the KAK colt magazine adapter. Turned out it was the ejector not sitting right in the bolt and this video helped sort me out! heated, bent, verified positioning. Now it runs like a beast.
@tomrhodes49077 күн бұрын
I just built my first ar9 using your grs and used a ballistic advantage barrel, it has a large chanfer for feeding which is nice but I can see the back of the bullet. Is that normal or is something wrong?
@Blowback93 күн бұрын
Perfectly normal. See photos here: blowback9.wordpress.com/2022/08/18/4-step-guide-to-make-almost-any-ar9-run-100/
@curtnichols69417 күн бұрын
If you are worried about "pistoning" with those rounds? Drill some holes in the back of the buffer tube like H&K does for the OTB "Over the Beach" M16 modification. Lot easier than grinding tungsten.
@Blowback93 күн бұрын
The Aero Enhanced buffer tube has holes in each buffer detent notch too - that will help a lot with air flow.
@SS-tr5ru8 күн бұрын
Maxim defense is extremely underrated as a company
@markcampbell20548 күн бұрын
I'd love to see A5 tubes comparing the hydrolic buffer and 2 weights vs the KAK plus the TACCOM mini add on buffer spring.
@sinistersilverado9658 күн бұрын
did I do something wrong, I haven't had any problems with my AR9 I built from parts from multiple vendors
@Blowback93 күн бұрын
Nope. Most of the time everything will work "good enough" to function without major problems. Sometimes the stacking tolerances all come together for a system that works perfectly and feeds everything.
@jn7100048610 күн бұрын
Does the K-Spec GRS variant have as much dot bounce as the hydraulic GRS?
@Blowback93 күн бұрын
I didn't compare them, but I'd expect so. Same mass moving in the tube.
@ajensen142710 күн бұрын
Are these the 1”x3/8” pinewood derby weights for sale on Pur-Tungsten?
@Blowback93 күн бұрын
Yes.
@joed326410 күн бұрын
I am a competitive shooter - IDPA PCC. What system would you recommend?
@joed326410 күн бұрын
I am a competitive shooter PCC IDPA. What system would you recommend? I am currently running a KynSHOT 5015HD with a 5.56 carbine spring. I use 160 gr 9mm bullets at a 135PF. Gun shoot fairly soft. MY 45ACP AR shoots as soft as a MP5 using the same spring and buffer.
@souporlouis11 күн бұрын
Im using a standard 556 lower..so i bought the sylvan arms magwell adapter and that has its own ejector that seems to be short..doesnt reach the top of the channel of the bcg. Is there a magwell adapter you can recommend that would work better and accept glock mags?
@michael9r9rsBlasters11 күн бұрын
Great vid! It will be interesting to see how these work long term.
@Blowback913 күн бұрын
This is proof of concept/experimental. For anyone curious, these are the weights I'm using, but they needed some air channels and beveling for reliability. pur-tungsten.net/shop/3-oz-tungsten-pinewood-derby-cylinder-weight/
@jn7100048613 күн бұрын
Anyone tried this with a side charger ar9?
@No_Wall_Hangers13 күн бұрын
Excellent as always. Do you by chance have the link to which ones you used?
@Blowback913 күн бұрын
pur-tungsten.net/shop/3-oz-tungsten-pinewood-derby-cylinder-weight/ $16 on sale. Very low price for tungsten.
@brentsealy96237 күн бұрын
Your channel must be giving them some traction. They're back up to $26 now lol. Eager to try them.
@MeMadeIt13 күн бұрын
Appreciate all the work and enjoy the experimentation. 👍
@dave_bob13 күн бұрын
Looks like they are holding up fine so far. Nice! I have 2 of the pur weights on the way along with the K*spec 5.5 buffer and flat spring
@Blowback913 күн бұрын
I just ordered a K-spec 5.5oz. buffer for testing.
@billdischer303213 күн бұрын
Same just ordered 2 tungsten and 5.6 oz buffer. 😊
@francisco419413 күн бұрын
If the new post May 2024 Wilson Combat Flat wire spring no longer fits the Kynshot, what buffer spring do you recommend as an alternative that will work?
@Blowback913 күн бұрын
Tubb AR-15, MidwayUSA, Spinta all fit really well. More here: blowback9.wordpress.com/2023/03/03/flat-wire-spring-comparison/
@Danko8814 күн бұрын
Just installed the gentle recoil system in my ANGSTADTARMS UDP-9 few days ago using the JRC buffer tube, with all the same parts you have listed. Yesterday went and shot about 200 rounds, what a difference it's so nice to shoot now and make follow up shots. used to kick like a mule with the standard tube and 6oz buffer. Adding a muzzle brake this week see if I can make it any better.
@Starwarsgames6614 күн бұрын
This is a really awesome product. I wonder how it would work with the Mean Arms bearing delay upper, basically a double delay. 😂 I have to admit I am kind of curious, especially if you’re suppressing it. Having that extra back pressure and having two delays might really help with the gas to my face. Although I don’t know if it would work having two delays.
@Blowback913 күн бұрын
It probably wouldn't cycle. Each mechanical delay is designed to dissipate a large part of the recoil energy. There wouln't be enough left over to operate the 2nd mechanical system.