White Label Armory 11.5" 5.56 Government Carbine Barrel

White Label Armory's 11.5" barrel is a carbine-gas short barrel for AR pistol and SBR builds. It is chambered in 5.56 NATO with a 1:7 right-hand twist, turned from 4150 CMV steel to a Government profile, and black nitrided. The carbine gas system runs through a .750" gas block journal with a .073" port, the barrel extension has M4 feed ramps, and the muzzle carries 1/2x28 threads and an 11-degree target crown. WLA lists it at 21.6 oz bare.

Pair it with a carbine-length gas tube and a gas block sized to the barrel's journal. The 1:7 twist stabilizes the full common range of 5.56 bullet weights, and the 1/2x28 threads take standard 5.56 flash hiders, brakes, and suppressor mounts. At 11.5" the barrel builds an AR pistol or, with a stock, a short-barreled rifle. Check your state's law before building it stocked, and file a Form 20 before taking an SBR across state lines.