Maxim Roller Delay Buffer: How does it work?

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Maxim Roller Delay Buffer: How does it work?

Рет қаралды 12,062

Күн бұрын

You asked, so here it is! The Maxim RDB system is a roller delayed drop-in system for the 9mm AR. Here's a quick explanation of how it works!
More information including links can be found at Blowback9.com.
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Пікірлер: 87

@SS-tr5ru 8 күн бұрын

Maxim defense is extremely underrated as a company

@BrianSmith-kv3px Жыл бұрын

Seriously considering this for my NFA C9 build now. Thanks, BB9!

@stevegillespie6424 Жыл бұрын

I gotta give it a try. I have a 16" home build, and a Saint Victor 9mm. Excited to give it a go in both. Thanks for all the info regarding this.

@stevegillespie6424 11 ай бұрын

So, holy crap! Until you have one of these installed, it is hard to quantify how much effort it takes to run the charging handle. YIKES!!! The effort needed is boarder line absurd. That's my initial installation, unfired preliminary observation.

@abitnutz6747 11 ай бұрын

@@stevegillespie6424 It's true, it's a beast to charge but I think it's worth it. I've ordered a Timbercreek charging handle. It has the largest handle I can find. I'm hoping it helps

@scott2228 10 ай бұрын

@@stevegillespie6424good point. I already have a 380 buffer spring in mine. Wonder if it would be heavier or lighter to charge. My AR9 runs amazing but as mentioned in the vid…. There is a lot of weight moving back n forth. Bc I shoot suppressed, I’m also running a 45ACP buffer weight. All this said…. Just shows how important the “last round bolt hold open” feature can be. Only having to charge it once. And not for a reload.

@coltonharmon7219 Жыл бұрын

Good luck getting one…. Mine has been on order from Maxim since June 12.

@ArmyMatt79 7 ай бұрын

Outstanding video!!!! I'm definitely getting one.

@michael9r9rsBlasters Жыл бұрын

Great vid! Thanks for taking the time to explain this.

@mikefields1873 4 ай бұрын

Thank you for this video, I just order the Maxim RDB last week. I have a Faxon Bolt with removable rear mass via a roll pin. I'm looking forward to seeing how my AR9 performs now.

@Blowback9 4 ай бұрын

Good luck - let me know how it goes!

@mikefields1873 4 ай бұрын

@@Blowback9 I can definitely say that the recoil impulse of my AR-9 is quite different. Can I claim that the recoil, or the felt recoil, is less... maybe a little. I've always perceived the recoil on my AR-9 to be almost circular, the way the gun fires and then settles. Today at the range, I had a few folks with me who said the same thing. All my AR-15 platforms recoil so differently. I've had this setup for about 3 years now (Aero Precision dedicated AR9, 8.5" barrel) and now today is the first day with the Maxim Defense RDS. So, I'm not entirely sure it was worth the money for what I got out of it, if that makes sense? A few years ago, I've shot some full auto MP5's, but I never took the time to 'feel check' the recoil impulse and how light that platform truly is. When I built the AR9, I was like, 'This thing kicks.' So, in conclusion, yes, it reduces the recoil somewhat and changes the impulse or feeling of how it recoiled before. Is it worth the money? For me, probably not. By the way, I love your channel; thank you for all the info you provide to the community. 👍

@abitnutz6747 11 ай бұрын

I installed a Timber Creek Enforcer charging handle on my Maxim Defense Roller Delayed AR9 in hopes of reducing the draw weight. How? Well, the Timber Creek C/H has a much larger handle than almost any other handle I've ever seen. In short, it works. The greater surface area of the Timber Creek lets you spread the load and reduce the apparent weight required to charge the rifle. The downside? It's a much larger handle. I have gorilla hands so I like it...a lot.

@apollow_g1025 Жыл бұрын

dude you are my hero thank you

@r1dv Жыл бұрын

Thanks for explaining. Can't wait for my order to come.

@Brian-gj5xm 6 ай бұрын

I could see thos being used in the KelTec Sub2000 and S&W FPC

@bayouromanian 11 ай бұрын

Excellent video, thanks for sharing!

@bakedandsteaked 10 ай бұрын

Great video

@Didymus-vz6uy 10 ай бұрын

Great video. I've got one of these myself, and I really like it. Could you do a review on the TACCOM PPC Adjustable Recoil System? It seems very interesting, Like a hydraulic buffer but using springs instead of hydraulics.

@Blowback9 10 ай бұрын

I have a very small budget for testing/reviews, but I'll add it to the list!

@anssi5853 10 ай бұрын

Thanks i get new ideas for my next built. Roll deley and many types buffer system i know but roller deley buffer wasn't. For hobbies macinest I have to say that it's wery simple wor that needs only lathe wor much easier that eny type bold or barrel.

@Starwarsgames66 14 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.

@Blowback9 13 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.

@123asap6 4 ай бұрын

Pair it with a CMMG radial delay bolt and it should give you some unexpected results. Whether that be good or bad will depend on the amount of tuning that goes into the system. Funny enough with both of these delay systems at the same time we might be able to build a pure delayed blowback 5.56.

@Blowback9 4 ай бұрын

Check out HK-33, ZF-56, PTR-63.

@devinwhite104 8 ай бұрын

ive been wanting to switch to the cmmg radial delayed bolt and barrel this looks like cheaper option i like it

@E52O4 6 ай бұрын

This system sounds good for a carbine length firearm. Even though this may reduce the felt recoil on an AR-9 pistol, I’m not sure that the reduction in felt recoil justifies this system over using a heavier buffer/spring combination. My AR-9 set up uses a carbine compatible buffer/ spring combination due to the SBC Tactical SBPDW brace I use. It has given me zero issues in over 1,000 rounds fired (actual number is probably higher, but I stop counting after 1,000 or so). Felt recoil is slightly more then AR-15 carbine, but not appreciably more than an AR-15 pistol IMHO.

@bensiniff2868 5 ай бұрын

I just ordered one to test . I'd like to see cycling performance and speed compared to just heavy weights

@racktech6384 2 ай бұрын

This looks similar to the Armaspec Stealth™ Recoil Spring - SRS™- AR15. Which they have been making for long time now and cost alot less. Great video no doubt Sir .

@Blowback9 2 ай бұрын

Looks similar, but this has a mechanical delay inside - very different mechanism. Thanks!

@RigSMP100 7 ай бұрын

Do you have a different video that compares the felt recoil between this and your personal gentle recoil system with a different buffer and spring?

@RobertSmoak 10 ай бұрын

Thank you so much for sharing your knowledge with us. Have you tried this with a suppressor? Any advice you can share about reducing port pop would be greatly appreciated.

@Blowback9 10 ай бұрын

I have, and it doesn't seem to make any significant difference. Sorry!

@jpay37 Жыл бұрын

Excellent video, thank you! In your opinion, if you were starting a 16” build from scratch would you use the roller delay buffer or the gentle recoil system?

@Blowback9 Жыл бұрын

I would use the Gentle Recoil System (video coming soon!) It's easier to charge and feels just about as good to me.

@jpay37 Жыл бұрын

@@Blowback9 Thank you...and looking forward to that video for sure!

@markrippt4677 Жыл бұрын

Good vid! I wonder how it compares to the Scheel RDB and the Taccom Magnetic Delay?

@Blowback9 Жыл бұрын

My tiny little budget is maxed out right now, so I'll have to let other folks do that testing!

@mjohnson43136 Жыл бұрын

Very interesting. Would you be able to weigh the reciprocating parts?

@Blowback9 Жыл бұрын

Weight of the roller delay mechanism and collar is about 4.3oz. The mechanical delay allows the use of much lighter masses in a blowback. With a 12oz. empty bolt, this would give about 16.3oz. total blowback reciprocating mass.

@UncleDanBand64 7 ай бұрын

I wonder how that would fair against +p and or +p+? I finally got my extractor in after blowing it into the next county with Underwood 147gr +p+. I know I said I would stick to +p but, I got an order of Underwood Extreme Defender 90gr +p+. My guess is that round would not have caused the failure that 147 caused. My thought is it would be exiting the barrel so much quicker that the chamber pressure would likely drop to a safe level before the bolt had any substantial reward travel. Kaw Valley Bolt, stock steel weight, carbine spring, 11oz Buffer, 11' Ballistic Advantage barrel.

@walt3r88 Ай бұрын

Is it worth the cost? How’s it compare to the cqb version?

@jn71000486 13 күн бұрын

Anyone tried this with a side charger ar9?

@justinrush6620 Жыл бұрын

Thanks for sharing, i think ive been reading all your posts about it on the AR forum? Curious to see someone short stroke it... Seems doable to put a delrin spacer over the main shaft there? Any thoughts?

@Blowback9 Жыл бұрын

That may be possible by making the white plastic spacer at the back, longer. I'll have to leave that experiment to other folks!

@Bromo_Sexual 10 ай бұрын

How to reduce the increased pull-back force of the charging handle with this roller delay system without affecting the roller delay’s performance? 😮

@Blowback9 10 ай бұрын

Good question! A Radian Raptor charging handle helps a little, but not much. Some folks on Arfcom are working on a camming system like the LevAR from Springfield.

@1DavidMarshall 6 ай бұрын

Explained very well. Thank you. Just curious how much recoil is muted. As say to the mp5. I have the magnetic delayed blowback buffer from taccom on1 of my ar9 it works well but charging is it a pain

@g.barrett8410 Жыл бұрын

Could this Maxim RDB work in a full auto Colt 635 9mm smg?

@bayouromanian Жыл бұрын

Great information. Thank you for sharing. Would you happen to have an idea of which binary triggers might work with which 9mm ar setups?

@Blowback9 Жыл бұрын

Here you go! blowback9.wordpress.com/2021/09/22/franklin-armory-bfsiii-binary-trigger-in-a-9mm-ar-oh-yea/

@bayouromanian Жыл бұрын

@@Blowback9 awesome thanks for sharing. I'm hoping it runs with the roller delay setup.

@jlwinesickle 4 ай бұрын

Have you tried the Vltor PCC buffer and spring?

@Blowback9 4 ай бұрын

I have not, sorry!

@From973to904 Жыл бұрын

Yeah I’d like to know the best way to run this

@adamg574 8 ай бұрын

I’m wondering if this would work in an FX-9. I don’t see why it couldn’t.

@abitnutz6747 11 ай бұрын

I just tried the Maxim as it came out of the box. I didn't lube it. It ran perfectly. This thing is really something. I'm shocked. The PCC is as follows: Aero Precision EPC 9 upper & lower. Ballistic Advantage EPC 9 barrel, Hiperfire Elite trigger, Odin Works Enhanced BCG, BCM Enhanced buffer tube, and Cross Machine muzzle brake. This thing has very little recoil. I'm stunned at how well it works. Not one hiccup. It just runs. I just wish I knew where, if, and with what I should lube the buffer widget.

@Blowback9 11 ай бұрын

I used standard bearing grease on the bearings and other parts. Seems to run fine with it.

@corvoattano4777 4 ай бұрын

What would happen if you put it into a regular a15 ?

@Blowback9 4 ай бұрын

It won't cycle properly. Regular AR-15's are gas operated, not blowback. Completely different operating system.

@corvoattano4777 4 ай бұрын

@@Blowback9 lets say the ar15 was overgassed and/or this system was somehow made slightly " lighter ". Lets just say for the sake of the argument the ar15 cycled. Would it reduce recoil ?

@abitnutz6747 11 ай бұрын

I just received my Maxim Roller Delay widget in the mail about 2-hours ago. It looks really well made. It had absolutely no directions with it as to maintenance. I'm wondering should I oil it? Grease it? Leave it dry? massage it and sing to it? Because of the way it works, I'm a little concerned that any lubricant or the wrong lubricant could cause it to malfunction. It arrived completely dry but there is metal on metal contact....inquiring minds want to know.

@stevegillespie6424 11 ай бұрын

I just got mine today as well. Zero instructions for lubrication. Nothing saying to lube it, and nothing saying not to. I put some Tetra grease on the ball bearings.

@Blowback9 11 ай бұрын

Mine was greased with clear grease. I use a thin coat of bearing grease on all the moving parts.

@jacobcarter6028 11 ай бұрын

Instead of using weights in the BCG of my Banshee I’m curious how this would work in conjunction with the radial delayed action. The banshee is an 8” and would be suppressed use only

@Blowback9 11 ай бұрын

I don't know, but I'll do some checking and see if I can find anyone who's tried it.

@Blowback9 11 ай бұрын

Found this - hope it helps: www.ar15.com/forums/ar-15/Maxim-Defense-RDB-review/15-780933/&page=7#i8576440

@MrKlassiPHIed Жыл бұрын

Does it silent the action like the jp silent capture spring does?

@Blowback9 Жыл бұрын

Yes, it is quiet.

@frankhart7757 Жыл бұрын

Would an FM upper with a forward charging handle give you better leverage to overcome the resistance on the buffer? I really want on of these.

@miserylovesshotguns Жыл бұрын

I was wondering that same thing. I don't like the idea of using a thin piece of polymer to push against that much mass.

@frankhart7757 Жыл бұрын

@@miserylovesshotguns Good point. Their paratrooper handle is aluminum though, I may try that.

@miserylovesshotguns Жыл бұрын

@@frankhart7757 how do you get one of those? I'll have to email them and find out.

@Blowback9 Жыл бұрын

Reports are mixed. Some say it helps a little, others say it doesn't.

@jdwojda Жыл бұрын

what BCG are you using that has the removable weights?

@Blowback9 Жыл бұрын

The bolt needs to be full length with a removable steel plug inside the back of the hollow bolt. KVP, B.Kings Firearms, New Frontier Armory, Faxon, and Angstadt Arms are a few made this way.