P
prestonHandsome10/10
Reviewed on May 16, 2026Verified with Build
shoots flat
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Faxon Firearms Ar-15 Gunner Barrel, 16", 5.56 Nato, Mid-Length, 4150 Qpq
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Faxon Firearms
Overview
The Faxon Firearms AR-15 Gunner Barrel is a 16-inch pencil-profile barrel designed for the 5.56 NATO caliber, making it a lightweight option for builders looking to maintain maneuverability without sacrificing performance. With a mid-length gas system and a 1:8 twist rate, this barrel optimizes reliability and accuracy, ensuring effective cycling and stability for a variety of bullet weights. This barrel is commonly found in builds that prioritize a balance of lightweight construction and reliable function in 5.56 NATO configurations.
Specifications
MPN15A58M16NGQ
Gas System LengthMid-Length
CoatingNitride
Twist Rate1:8
Barrel ProfileM4
Barrel Length16
Caliber5.56 NATO
Thread Pitch1/2x28
FinishBlack
Gas Block Diameter.625
Faxon Firearms Ar-15 Gunner Barrel, 16", 5.56 Nato, Mid-Length, 4150 Qpq
Frequently Built With
Based on build data
CMMG AR-15 HD Pivot and Takedown Pin Parts Kit - 55AFF3B
Wilson Combat Ar-15 Lo-Profile Gas Block .750" Black
Wmd Guns Ar-15 Gas Tube Nitromet Mid-Length
Aero Precision Stainless Steel Gas Tube - Mid-Length
Radian Weapons Ar-15 Raptor-Lt Ambidextrous Charging Handle Fde
Wilson Combat Ar-15 Billet Upper Receiver
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%
CaliberBased on real build data showing which calibers builders choose alongside this product.
100%
5.56 NATO100%
Gas SystemBased on real build data showing which gas system lengths builders use with this product.
100%
Mid-Length100%
| Product | Category | Times Built Together |
|---|---|---|
| CMMG AR-15 HD Pivot and Takedown Pin Parts Kit - 55AFF3B | 3 | |
| Wilson Combat Ar-15 Lo-Profile Gas Block .750" Black | 3 | |
| Wmd Guns Ar-15 Gas Tube Nitromet Mid-Length | 3 | |
| Aero Precision Stainless Steel Gas Tube - Mid-Length | 3 | |
| Radian Weapons Ar-15 Raptor-Lt Ambidextrous Charging Handle Fde | 2 | |
| Wilson Combat Ar-15 Billet Upper Receiver | 2 |
| Platform | Percentage |
|---|---|
| AR-15 | 100% |
| Caliber | Percentage |
|---|---|
| 5.56 NATO | 100% |
| Gas System | Percentage |
|---|---|
| Mid-Length | 100% |
Builds Featuring This Part
See all 8 →Builds in the community that include the Faxon Firearms Ar-15 Gunner Barrel, 16", 5.56 Nato, Mid-Length, 4150 Qpq
| Build | Parts | Total |
|---|---|---|
 | 19 | $1135.19 |
 | 26 | $1750.38 |
 | 9 | $449.57 |
 | 28 | $2188.20 |
 | 12 | $1204.81 |
 | 20 | $932.92 |
 | 19 | $1401.86 |
| 21 | $1098.25 |
Customer reviews
5.0out of 5
2 global ratings
Top reviews
J
joshs25661814Faxon Gunner 16 mid clean
Reviewed on May 1, 2026Verified with Build
Faxon Gunner 16 inch barrel in 4150 chrome moly with QPQ is the budget end of their lineup but quality is solid. Chamber gauges clean. Mid length gas system runs smooth with M193 ball ammo. QPQ finish is holding up after 600 rounds without showing wear on the muzzle threading.
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