This A2 fixed buffer tube assembly kit provides the receiver-extension hardware needed to run an A2 fixed butt stock on an AR-15 rifle build. Use on classic A2-pattern uppers, dedicated rifle-length builds, and any AR-15 build that calls for a fixed rifle stock.
Fit: A2 fixed butt stocks only. NOT compatible with mil-spec or commercial-spec carbine stocks — the tube length and diameter differ.
Includes:
A2 rifle stocks pair with rifle-length gas systems on 20" barrels for the cleanest gas curve and softest recoil impulse. The longer A2 spring and buffer geometry smooth out cycling vs. carbine-length systems. Verify your lower is configured for an A2 stock before install.
