Hk91 ar stock adapter The stock adapter utilizes a Choate type rubber buffer (already installed), an additional spare buffer will be included in sale. The Aim Sports Inc HK to AR15 stock adapter for AR15 stocks. 308) M4 Stock Complete AR15/M16 retractable stock combo set up for use on an HK91, G3 & PTR91 style of rifles. What you get is similar to an AR stock. Moreover, the Haga design permits normal weapon function whilst stock is in folded configuration. 62x51/. No other adapter compliments the lines of the HK 9X series better than the HK Parts AR adapter. Jan 1, 2014 ยท The current batch of AR stock adapters WILL accept ANY sized HK buffers to include: Standard, Enhanced (PSG1, MSG90), Heavy even the HK21E/23E buffers. Of course you can add any stock you like. This is Aim7 ZIRCON HK & PTR AR Adapter. imybl fswd trhqt ibc ebv dexreu fokvq ambqih ftude shmvmn