Z
Zaccaiah762happy overall
Reviewed on April 29, 2026
fit was tight to the upper, took some persuasion to seat properly
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Faxon Firearms
Overview
The Faxon Firearms 300 AAC Blackout 10.5" barrel is designed for maximum versatility in compact builds, featuring a pencil profile that keeps the overall weight down while maintaining structural integrity. With a 1:8 twist rate, this barrel is optimized for stabilizing a variety of projectile weights, making it a solid choice for both subsonic and supersonic loads. The pistol-length gas system and .750 gas block diameter ensure reliable cycling in shorter AR-15 configurations. This barrel commonly appears in builds focused on 300 Blackout for applications such as home defense and tactical use.
Specifications
MPN15A38P10NGQ
FinishBlack
Barrel ProfilePencil
Gas System LengthPistol
Gas Block Diameter.625
Barrel Length15
CoatingNitride
Twist Rate1:8
Thread Pitch5/8x24
Caliber300 Blackout
FAXON Firearms 300 AAC Blackout 1-8 Twist 10.5" Barrel
Available Merchants(7)
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October 2026 on GunPartPicker
FAXON Firearms 300 AAC Blackout 1-8 Twist 10.5" Barrel ranked #15 of the 329 barrels builders added on GunPartPicker in October 2026. Builders have added it to their builds on GunPartPicker. Since April 2026, it is the tenth most added barrel on the site. 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 6 of the 7 retailers we track have it in stock. Prices barely moved in October 2026, holding around $151, with no real sale all month. Buying today, the lowest price is $151 at Optics Planet.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
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Read the guide: AR-15 Barrel Length & Brand Report →Check it against the live catalog:
Frequently Built With
The part most often added in each category by the builds that include this one
Bravo Company Mfg Upper Receiver Assembly w/ Laser T-Markings, Hard Coated Anodized - 4-UR-M4
Upper Receiver$129 · out of stockin 19% of them
Wilson Combat AR-15 Lower Receiver Forged
Lower Receiver$100 · out of stockin 9% of them
Midwest Industries Suppressor Series M-LOK AR-15 Handguard - 10.5"
Handguard$174in 14% of them
Aero Precision AR-15 Breach Charging Handle Ambidextrous Small Levers
Charging Handle$72 · out of stockin 17% of them
Cryptic Coatings 5.56 NATO AR-15 Bolt Carrier Group - Mystic Bronze
Bolt Carrier Group$218in 7% of them
WMD Guns AR-15 Gas Tube Nitromet Mid-Length
Gas Tube$14in 11% of them
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.
100%
AR-15100%
Builds Featuring This Part
See all builds →Builds in the community that include the Faxon Firearms 300 Aac Blackout 1-8 Twist 10.5" Barrel
| Build | Parts | Total |
|---|---|---|
 | 19 | $673.87 |
 | 14 | $1408.16 |
 | 13 | $4656.50 |
 | 26 | $4821.47 |
 | 33 | $6545.23 |
 | 14 | $1046.20 |
 | 31 | $3512.69 |
 | 16 | $918.43 |
 | 17 | $1991.09 |
 | 10 | $1279.75 |
Customer reviews
4.0out of 5
1 global rating
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