The Lead & Steel .300 Blackout Government Profile AR-15 Barrel (brand part no. LS300-14.5) is a 14.5-inch match-grade barrel turned from 4150 Chrome Moly Vanadium steel, built for shooters upgrading a .300 Blackout upper. Lead & Steel coats the barrel in a QPQ black nitride finish for corrosion and wear resistance, and machines M4 feed ramps into the government profile for reliable feeding. A 1:7 twist stabilizes both lightweight supersonic and heavy subsonic .300 Blackout loads. Among our AR barrels, this Lead & Steel barrel suits .300 Blackout builders who want a genuine match-grade barrel without a premium price tag.

Key Specifications

• The chambering is .300 Blackout.
• The barrel is 14.5 inches long.
• The rate of twist is 1:7 inches.
• The material is 4150 Chrome Moly Vanadium steel.
• The finish is QPQ black nitride.
• The profile is a government profile with M4 feed ramps.

Frequently Asked Questions

Can I run this on a standard rifle-configuration lower? A 14.5-inch barrel falls under the 16-inch legal minimum for a rifle, so it requires a permanently pinned-and-welded muzzle device to reach legal length, or use on a registered pistol/SBR lower.

Does the 1:7 twist handle subsonic loads? Yes, a 1:7 twist stabilizes both lightweight supersonic and heavier subsonic .300 Blackout bullets.

Does this barrel include feed ramps? Yes, M4 feed ramps are cut into the government profile for reliable feeding.

Buy the Lead & Steel .300 Blackout Government Profile AR-15 Barrel

A genuine match-grade 4150 CMV barrel with a durable nitride finish, this Lead & Steel 14.5-inch barrel gives .300 Blackout builders real quality at an accessible price. Contact our Lubbock, Texas gun shop and we’ll get it ready as soon as it’s available to ship.