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300 Blackout Barrel

300 Blackout Barrel


Looking for the most accurate, longest-lasting, most affordable and most reliable 300 Blackout Barrels on the market? Your search has ended. We’re excited to offer all mil-spec barrels that feature the best manufacturing processes available, at great prices. With a wide selection of barrels ranging in profiles, sizes (7” to 16”), and steel options, there’s a solution for your 300 Blackout building needs.

Every barrel we sell on our site starts as a mil-spec 4150 Chromoly or 416R stainless blank – these alloys form the best barrel steel available today. Each barrel is precision machined by CNC to ISO 9002 quality control standards. Every barrel is then heat-treated to obtain a Mohs hardness rating of RC 28 to 32, which hardens the rifling lands and grooves to a point that it does not require chrome lining to retain superior barrel life. The result is a more rugged and reliable barrel that’s more accurate and costs less even still. Finally, every barrel is chambered with polished M4 feed ramp, guaranteeing reliable feeding any light or heavy 300 Blackout load.

To perfectly represent the value of the 300 Blackout round, every barrel features universal 5/8 x 24 thread pitches, making suppressor attachment easy and tool-free. To be sure, our barrels are some of the best on the market, but our prices are just as great. We’re not cheap, just affordable.

Buyer's Guides for Additional Product Information:

Read: 300 Blackout Barrels Buyer's Guide

Read: 300 Blackout Barrel Steel Analysis

Read: 300 Blackout Upper Buyer's Guide

    Why Our 300 Blackout Barrels

    • Features mil-spec 4150 Chromoly or 416R Steel
    • Includes polished M4 feed ramps
    • Features carbine- or pistol-length gas systems
    • Reliably cycles super and subsonic loads
    • Heat treated for superior accuracy and barrel life
    • Can be mated with any standard AR 15 upper receiver
    • Standard 5/8 x 24 thread pitch makes suppression easy
    • Made in the USA