Maxim Roller Delay Buffer: How does it work? 

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.

@@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

@@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.

Good luck - let me know how it goes!

@@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. 👍

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

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

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

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

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

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

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

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

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

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

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.

I have not, sorry!

Yes, it is quiet.

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.

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.

Watch for a video I'm about to publish about the "Gentle Recoil System". Coming soon!

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.

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

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.

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

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

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

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

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

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

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

@@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 ?

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

I didn't notice much of a difference, but others have said they thought the port pop was louder.

Yup!

It makes the gun more than double harder to charge…