Description:

Stern def.Barrel.45acp 6".578-28" 1:16 melonite ar-15
FEATURES:Caliber: 45ACPLength: 6 InchesThreaded .578-28Twist: 1:16 4150 Chrome-moly steelMelonite coatingMade in the U.S.A

Other Features: Threaded.578-28, 1:16 twist, 4150 chrome-molly steel, melonite coating this must be used with a 11 ounce buffer or heavier when using a carbine spring,.45acp uppers require an enlarged ejection port