Buffer and system balance
AR15BARRELS.COM - Randall's description of AR gas operation and how everything works in harmony
Car std 3.0oz
Car H 3.8oz
Car H2 4.6oz
Car H3 5.4oz
RRA 9mm 5.6oz
Normally pick the heaviest one that will still cycle WOLF reliably and lock back on the last shot.
Take 20 mags, and load them all with ONE round. run through that cycle a few times, and you can be reasonably certain that the rifle will function correctly with that particular buffer.
HOWEVER. keep in mind, that when the rifle gets hot and dirty, you then may start experiencing short strokes with a heavier buffer.
SO, whatever the heaviest buffer that will reliably lock back on the last round, fully cycle........EVEN when using UNDERPOWERED ammo (wolf) and with a dirty action.
THAT is the buffer you want. a proper weight buffer will minimize battering of the parts, soften recoil impulse, improve follow up shots, increase dwell (hense increasing accuracy, and minimizing chamber blowback).....etc.