Mounted on a foxtrot mike ar 15 pistol - SIG SAUER Stock Adapter - 1913 Interface Folding Knuckle

My Foxtrot Mike is a bufferless 556 pistol with a 9" barrel. It has never has had a fail to feed, or extract. It shoots groups like a rifle. The pistol has a picatinny mount and this attaches to that. I used an empty carbine buffer tubeto screw into the mount. I used a SBT4 pistol brace to finish thing off. The mount is stiff at first but a little gun grease and use fixed that.