The Odin Works .300 Blackout Barrel in 8-inch Medium Profile Black (Odin Works part no. B-300-8-P-TG-BLK) is a bare AR-platform barrel machined from 416R stainless steel and hand lapped for a smooth, consistent bore. Odin Works cuts M4 feed ramps into the barrel extension and threads the muzzle 5/8-24, and the barrel ships with a black nitrided adjustable gas block already installed. At 8 inches, this is a bare barrel component, not a complete upper or firearm; pairing it with a shouldered, rifle-configured lower without prior ATF approval would create an unregistered short-barreled rifle, so it belongs on a pistol-configured build or a properly registered SBR.

Key Specifications

• Machined from 416R stainless steel and hand lapped for a smooth, consistent bore.
• Cut with M4 feed ramps for reliable feeding on an AR-platform upper.
• Threaded 5/8-24 at the muzzle for compensators, brakes, or suppressor mounts.
• Ships with a black nitrided adjustable gas block already installed.
• A 1:8 twist rate stabilizes both supersonic and subsonic .300 Blackout loads.
• Built around a pistol-length gas system to match the barrel’s short overall length.

Frequently Asked Questions

Is this barrel legal to buy without a tax stamp? Yes, an 8-inch bare barrel is an ordinary Title I part. It only becomes a regulated short-barreled rifle if installed on a shouldered, rifle-configured lower without prior ATF approval, so it belongs on a pistol build or a properly registered SBR.

Does this barrel include a gas block? Yes, it ships with a black nitrided adjustable gas block already installed.

Buy the Odin Works .300 Blackout Barrel, 8-inch Medium Profile Black

Order it from our Lubbock, Texas gun shop and we will get it ready to ship as soon as it is available. Browse more AR barrels to compare lengths and calibers.