14.5" pre-ban M-4 profile with a 1x9 twist, 4150 11595E Steel with Chrome Lining. Comes with FSB, barrel nut, and handguard cap. Does not include front sight post, detent, spring or front sling and rivet Always have a competent gunsmith assemble your barrel or rifle kit and headspace your barrel before first use. Using a rifle put together incorrectly or assembled using incorrect or modified parts can result in a damaged rifle, personal injury, death, or damage to property. THIS BARREL IS FOR SBR OR PISTOL USE UNLESS MODIFIED TO BE NFA COMPLIANT.