Right, i know that, I was just wondering if anyone has done that leg work already so I don't have to.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.
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.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 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.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 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.
This is what I needed. Thank you sir.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