Buffer for BCM 16" mid

[cbickel]

I am getting ready to purchase a new upper from bcm. I am also going to be purchasing a stock kit to put on my new lower. What buffer weight do you all recommend? H? H2?

 

[TheDude]

Tagged for info

 

[Vamptepes]

Your run the heaviest one that allows the gun to function. Most of the time a h will be enough.

 

[cbickel]

Your run the heaviest one that allows the gun to function. Most of the time a h will be enough.

Right, i know that, I was just wondering if anyone has done that leg work already so I don't have to.

I run an H buffer in my 6920 and it does fine.

 

[Fargo]

I would start with an H and only go up if it is showing signs of being overgassed. Middies have a gentler pressure curve than carbines and are supposed to be gentler gas-wise.

 

[Vamptepes]

Right, i know that, I was just wondering if anyone has done that leg work already so I don't have to.

I run an H buffer in my 6920 and it does fine.

No 2 guns are alike even the same model. It all depends on the gas system. Majority of gas systens are oversized which is why h is normally the best bet. I run carbine in all 3 I have built. But my next gun i am going with an adjustable but also it is a 300 blackout.

 

[Cameramonkey]

Not to thread jack, but I'm starting to look at building a flat-top freefloat upper for 100-200 yard shots (No farther) so this is of interest to me too. With a carbine length (Bushmaster XM15-E2S) Do I need to stay away from a rifle length upper if I plan on using my lower for both? I'm waffling between a 18" and 20".

 

[Fargo]

Not to thread jack, but I'm starting to look at building a flat-top freefloat upper for 100-200 yard shots (No farther) so this is of interest to me too. With a carbine length (Bushmaster XM15-E2S) Do I need to stay away from a rifle length upper if I plan on using my lower for both? I'm waffling between a 18" and 20".

I've seen a few of rifle gas systems over carbine stocks and all worked. I would stay away from a heavy buffer though as the rifle gas curve is much less sharp than the carbine.

The real concern IME is finding a carbine stock which allows a true cheek weld.

 

[chubbs]

I would stick to carbine buffers. They work, and its not like the recoil is heavy on a 5.56

 

[Lock n Load]

I have 2 BCM rifles, one factory came with an H buffer and is a middie, the other is a complete lower and came with an H2 buffer that I run as an SBR.

 

[Vamptepes]

I've seen a few of rifle gas systems over carbine stocks and all worked. I would stay away from a heavy buffer though as the rifle gas curve is much less sharp than the carbine.

The real concern IME is finding a carbine stock which allows a true cheek weld.

I have a 20inch gun I built rifle length gas system on a carbine stock lower. Carbine buffer etc. Have a scope on it and have no problems. I used a carbine setup though for coyote hunting. I can always depend on have proper form when shooting and I need to be able to adjust for that somewhere. That is why it will always stay with a collapsible stock.


Edit: didn't mean to quote your post so ignore that.

 

[mammynun]

I'd start with an H if you're ordering it; I've found that it's easier to source a standard buffer locally than a heavier one, and you probably have a friend with a standard buffer that would be willing to give or trade you one if you need it. I suspect either would be fine.

 

[Trigger Time]

BCM says their midlength uppers are designed to run with a "h" buffer. My factory midlength BCM rifles have "h" buffers and run like a dream. So get an "h" buffer and call it a day

 

[flatlander]

I have 2 BCM rifles, one factory came with an H buffer and is a middie, the other is a complete lower and came with an H2 buffer that I run as an SBR.

Same thing except 1 middie and 1 carbine length. Straight from BCM the same way.

Bob

 

[cbickel]

BCM says their midlength uppers are designed to run with a "h" buffer. My factory midlength BCM rifles have "h" buffers and run like a dream. So get an "h" buffer and call it a day

This is what I needed. Thank you sir.