Complete A2 fixed-stock kit: polymer A2 stock, A2 rifle receiver extension, rifle buffer, rifle spring, spacer, and screw.
+11 more
The KAK Industry AR-15 Rifle A2 Buttstock Kit is the classic M16A2-pattern fixed stock with everything behind the lower receiver in one box: the polymer A2 stock with its trap-door storage compartment, an A2 rifle-length receiver extension, an AR-15 rifle buffer, a rifle action spring, the A2 spacer, and the assembly screw. The stock is 10.5 inches long.
Because it brings its own tube, buffer, and spring, it replaces a carbine rear assembly outright rather than sliding onto a carbine buffer tube. A rifle-length extension takes no castle nut or end plate; the stock captures the takedown detent spring and the assembly screw holds it to the tube.
The rifle buffer system runs a longer spring and heavier buffer than a carbine setup, which is the reason service-rifle, retro, and fixed-stock compliance builds still use it. The trade is a fixed length of pull and a longer, heavier rear end than a collapsible carbine stock.
Add the KAK Industry AR-15 Rifle A2 Buttstock Kit to your build and see how it enhances your platform.