FAXON Firearms Duty 300 Black Threaded Barrel 10.5INCH Pistol Length 1-8 Twist 5/8x24 Mag Phosphate Mag Phosphate
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Faxon Firearms
Overview
The Faxon Firearms Duty 300 Blackout Barrel features a 10.5-inch Gunner profile, which is designed to balance weight and performance, making it ideal for a variety of applications. With a 1:8 twist rate, this barrel stabilizes a wide range of bullet weights, enhancing accuracy and reliability in your builds. The pistol-length gas system ensures a smoother cycling operation, particularly when paired with suppressors, which is common in compact AR-15 builds optimized for versatility and maneuverability.
Specifications
FAXON Firearms Duty 300 Black Threaded Barrel 10.5INCH Pistol Length 1-8 Twist 5/8x24 Mag Phosphate Mag Phosphate
Available Merchants(4)
Prices checked
Price Alert
October 2026 on GunPartPicker
FAXON Firearms Duty 300 Black Threaded Barrel 10.5INCH Pistol Length 1-8 Twist 5/8x24 Mag Phosphate Mag Phosphate ranked #19 of the 329 barrels builders added on GunPartPicker in October 2026. Builders have added it to their builds on GunPartPicker. Since April 2026, it ranks #27 of the 1,042 barrels builders have added. Builds with this barrel are nearly all chambered in 300 Blackout, nearly all on pistol-length gas, and nearly all AR-15.
Availability is good: it was in stock at one retailer or another nearly every time we checked in October 2026, and today all 4 retailers we track have it in stock. It dipped to $184 at BattleHawk Armory for a stretch in October 2026, well under its usual $228, so sales do come around. Buying today, the lowest price is $184 at BattleHawk Armory, which matches the best price we saw in October.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
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Frequently Built With
The part most often added in each category by the builds that include this one
PSA AR-15 Built Stealth Upper Receiver - No T Marks - 516444539
Wilson Combat AR-15 Lower Receiver Forged
Bravo Company M16 Bolt Carrier Group Black
Midwest Industries Suppressor Series M-LOK AR-15 Handguard - 10.5"
Radian Raptor Slim Line Ambidextrous AR-15 Charging Handle - Black
Strike Industries Collar Adjustable Gas Block
Build Configuration Breakdown
Aggregated and anonymized data showing how builders use this product
PlatformBased on real build data showing which platform (AR-15, AR-10, AR-9) builders pair with this product.
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