...what is the optimal buffer weight to use?
Also, how exactly do the two different (rifle gas/carbine recoil assembly) systems interact? i.e. is a rifle going to generate more force to the carrier thereby necessitating a heavier buffer?
...what is the optimal buffer weight to use?
Also, how exactly do the two different (rifle gas/carbine recoil assembly) systems interact? i.e. is a rifle going to generate more force to the carrier thereby necessitating a heavier buffer?
What barrel length?
Assuming you are using a 20" barrel and a rifle length gas system, generally the standard carbine buffer and spring kit have been known to not be as forgiving as other setups, even when using heavier springs and buffers.
Your best option is a Vltor A5 system. This gives you the feel and reliability of the rifle spring and buffer, but with the advantages of a collapsible stock.
OP,
You may want to search Iraqgunz' post history. I want to say I remember him recommending a specific buffer and spring combo for this recently.
ETA: Here it is along with a link to the thread. Hope this helps.
https://www.m4carbine.net/showthread.php?t=92388
My old man has many thousands of rounds through a 20" barrel, rifle gas upper on a carbine RE and standard carbine buffer. The only failures to date were definitively ammo related (couple case deformities). For reference, his firing schedule isn't quite up to M4C style, but he pushes the limits far beyond the average bubba/dirt clod killer.
Not to disregard the A5 guidance... I agree and have suggested it myself as the technically "better" solution for his rifle... but in his case it's a wad of cash for something that wouldn't provide him any benefit.
ETA: Should also mention he has shot everything from XM193 down to Wolf through it.
Yeah, it's a 20" barrel.
So the rifle gas system DOES impart more recoil impulse than a carbine then? I see the A5 recommended and that would lead me to believe that is the case.
Another question: can you use the A5 spring in a regular (non-A5 length) carbine tube? Never mind, just read on Bravo's website to not use it with a standard carbine tube.
As I recall, the Canadian C7s with telescoping stocks use the H3.
I have a Wolff Extra Power carbine spring still in the wrapper. Would that and an H2 or H3 bolt suffice?