I'm gathering the receiver extension parts for an incoming SIG 516 14.5" upper. Can this upper work with an A2 receiver extension? (I'm looking at the Hogue fixed A2 stock.) What buffer should I use (mfg? H/H2/H3?) for both the A2 and mil-spec carbine extensions?
As for action springs, I'm thinking about the Wolff standard power ones as my toys always run well with Wolff.
"Once is happenstance, twice is coincidence, three times is enemy action." - Ian Fleming
Carbine - H / H2 with a standard spring (I run w/ a H2 in mine)
A2 - Rifle buffer or the above combo w/ a spacer
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