Product Description
14.5" pre-ban M-400 profile with a 1x7 twist, 4150 11595E Steel with Chrome Lining. These are the same profile as the M400 Sig used to offer with the FSB.
This short M400 type Barrel - 14.5” in length - features a permanently pinned and welded Extended A2 "Birdcage” Flash Hider.
This combination yields an overall length of 16 3/8” for legal use on standard semi-auto rifles. The barrel extension has the M4 style feed ramps. Also included are the Barrel Nut, Front Handguard Cap, Front Sight Base (Stripped) and Bayonet Lug. This high-quality barrel is machined from 4150 Chrome Moly Vanadium 11595E Steel, chrome lined in both Bore and Chamber, and Black Manganese Phosphate finished for protection against rust and corrosion. Button rifled 1 turn in 7" (RHT) to stabilize bullets from 50 to 77 grains.
