This premium quality M4 pattern Barrel – 14.5″ long  has a permanently affixed Phantom Hider. Its 16 3/8″ overall length makes it legal for use on standard semi-auto rifles. It features the reliable M4 Feed Ramps, and is machined from 4150 Chrome Moly Vanadium 11595E Steel, and Chrome lined in both bore and chamber for long wear and ease of cleaning. The Black Manganese Phosphate finish protects against rust and corrosion. It includes Barrel Extension, Barrel Nut, Handguard Cap, A2 Front Sight Base with Square Sight Post, Sling Swivel, and Bayonet Lug.  Barrel available in 1×9 or 1×7 twist.