Brownells AR-15 Model 601 M16A1 Fixed Buttstock Assembly

A retro fixed buttstock styled after the "Type D" stock on the Model 601 and M16A1, with a rear sling swivel and no trap door compartment. Brownells notes black is correct for the Model 602, XM16E1, M16A1 and later rifles.

It is a fixed rifle length A1 stock for a rifle receiver extension. The A1 length buttstock screw and instructions come with it; the receiver extension and other hardware do not.