1:5 twist marking on Faxon Match Series 300 BLK barrel

FAXON MATCH SERIES GUNNER PROFILE 7.5" 1:5T PISTOL-LENGTH 300 BLK AR15 BARREL

Faxon
SKU:
15B35P7NGQ-5R-NP3
|
UPC:
816341026629
Availability:
Usually ships within 2 business days when available.
$189.00

Not sure if this is the right 300 Blackout barrel?
We built a complete guide covering barrel length, twist rate (1:5 vs 1:8), suppressed performance, and series differences.

Read the 300 Blackout Barrel Buyer’s Guide →

(9 reviews)
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Description

Faxon Match Series Gunner Profile 7.5" 1:5T Pistol Gas 300 BLK AR-15 Barrel (15B35P7NGQ-5R-NP3)

The Faxon Match Series 7.5" 300 BLK Gunner Profile barrel is built for the most common real-world 300 Blackout use case: a compact AR pistol / PDW setup running heavy subsonic ammo, often suppressed, where bullet stability and consistent cycling matter more than anything else. A fast 1:5 twist (RH) helps stabilize longer, heavier 300 BLK projectiles in short barrels, and Faxon’s Match Series architecture is designed to keep performance repeatable: 416R stainless steel with 5R button rifling to help reduce jacket deformation and fouling versus traditional sharp-shouldered rifling. If you’re building a short 300 BLK that needs to run subs (and still behave when you switch to supers), this SKU is engineered to remove uncertainty.

Every Faxon rifle barrel begins life inside our Greater Cincinnati manufacturing operation, where we control critical steps from raw steel to finished barrel. Blanks are cut, drilled, reamed, and rifled in-house, then stabilized via stress relief before final profiling. All Faxon barrels are 100% magnetic particle inspected (MPI), and Faxon Match Series barrels are finished with a durable Salt Bath Nitride / QPQ for corrosion resistance and wear protection. For this specific barrel, critical features are verified using air-gauge bore checks, custom hardened gauges, coordinate measuring machine (CMM) verification of chamber geometry, along with 300 BLK GO/NO-GO headspace verification.

Suppressor ecosystem tip: If you plan to shoot both subsonic and supersonic loads—especially suppressed—pair this barrel with a tunable gas solution. An adjustable gas block and appropriate buffer/spring tuning can reduce blowback, smooth recoil impulse, and improve reliability across ammo types.

Warranty
All Faxon Firearms products are backed by our Limited Lifetime Warranty.
For full warranty terms, service instructions, and exclusions, please visit:
https://faxonfirearms.com/warranty-privacy-terms/

Key Features & Tech Specs

Note: Barrel profile aesthetics can vary based on caliber, overall barrel length, and gas-system length.

Explore Related (Internal Links)
Series decision helper (aligned to the catalog):
Match Series: 416R stainless + 5R rifling + recessed 11-degree target crown + nickel-Teflon/NP3 coated extension + QPQ.
Duty Series: 4150 CMV + traditional rifling + QPQ + non-recessed 11-degree target crown.
Combat Series: 4150 CMV + traditional rifling with chrome-lined bore and chamber and a rugged mag-phos exterior.
Match-X Series: Match-series architecture (416R + 5R + coated extension + recessed crown) with a honed/lapped bore and a media-blasted stainless exterior (instead of nitride).

FAQs

Is this barrel made in the USA? ▾

Yes. This barrel is manufactured in-house by Faxon Firearms in Greater Cincinnati, Ohio.

Who is this 7.5" 300 BLK barrel for (and not for)? ▾

Best for: compact AR pistols/PDWs, suppressed setups, and heavy-for-caliber subsonic loads where stability and tunability matter most.

Not ideal for: prolonged rapid-fire strings where maximum heat tolerance is the primary goal (consider Combat or Duty options depending on priorities).

Why a 1:5 twist for a short 300 Blackout barrel? ▾

Short 300 BLK builds are commonly paired with longer/heavier bullets, especially for suppressed subsonic use. A fast 1:5 twist is selected to support stabilization and consistency with those projectiles in compact configurations.

What do I need to know for compatibility (threads, gas, gas block size)? ▾

This barrel uses 5/8x24 muzzle threads, an AR-15 pistol-length gas system, and a .750" gas block journal for standard .750 gas blocks (including adjustable gas blocks).

How is quality verified on this barrel? ▾

Faxon verifies critical features through inspection gates including air-gauge bore checks, custom hardened gauging, coordinate measuring machine (CMM) verification of chamber geometry, 300 BLK GO/NO-GO headspace verification, and 100% magnetic particle inspection (MPI).

Is this a good barrel for suppressed shooting? ▾

Yes—this barrel is purpose-aligned to suppressed 300 BLK builds (especially heavy subs). For best results across subs and supers, use a tunable gas solution and buffer/spring tuning matched to your suppressor and ammo.

What warranty comes with this barrel? ▾

All Faxon Firearms products are backed by our Limited Lifetime Warranty.
For full warranty terms, service instructions, and exclusions, please visit:
https://faxonfirearms.com/warranty-privacy-terms/

Warranty Faxon Lifetime Guarantee. Covers manufacturing and material defects to the original purchaser. Excludes damage from misuse, neglect, non-standard ammunition, or modifications. Register your product at faxonfirearms.com/product-registration to expedite service. For purchases through dealers or distributors, warranty repairs are handled directly by Faxon Firearms; refunds must be processed through the selling entity. Full policy: faxonfirearms.com/warranty-privacy-terms/