Rear Buffer Tube Stock Adapter for AK47 Chiappa/NAK 9mm Pistol. Our new AR stock adapter makes it easy thread on your choice of AR Buffer tube, Blade or Brace that utilizes a buffer tube. It attaches to your Chiappa AK pistol using our adapter attaching to the rear of your receiver through the OEM sling hole. Parts include our rear Flat mount, AR Buffer tube threaded cap, and all hardware.