AR-15 Gunner Barrel, 14.5", 5.56 NATO, Mid-Length, 4150 QPQ
$156.40 at Ammunition Depot · 10 stores
In stock
Best price
$161.00at Brownells
In stock Lowest in 30 dayschecked Nov 13, 2026
Fits and works with
- Caliber
- 5.56 / .223 · Shop matching ammo
- Bolt
- Standard AR-15 (5.56 / 300 BLK / .350 Legend) · Bolt carrier groups
- Gas system
- Mid-length · Handguards
- Muzzle thread
- 1/2x28 · Muzzle devices
- Barrel length
- 16" · Handguards
Specifications
- Manufacturer
- Faxon Firearms
- Color
- Black
- Platform
- AR-15
- Caliber
- 5.56 mm NATO
- Barrel length
- 16"
- Twist rate
- 1:8
- Thread pattern
- ½ x 28
Where to buy
| Store | Price | Availability | Buy | Add to build |
|---|---|---|---|---|
| Brownells Best price 17.76% off · ends Nov 15 · exclusions apply | $161.00checked Nov 13, 2026 | In stock | Buy at Brownells | |
| OpticsPlanet | $171.00Salechecked Nov 12, 2026 | In stock | Buy at OpticsPlanet | |
| MidwayUSA | $171.00checked Nov 13, 2026 | In stock | Buy at MidwayUSA | |
| GunMag Warehouse | $171.99checked Nov 13, 2026 | In stock | Buy at GunMag Warehouse | |
| Ammunition Depot | $184.99checked Nov 13, 2026 | In stock | Buy at Ammunition Depot | |
| Battlehawk Armory | $131.45Salechecked Nov 13, 2026 | Check store | Buy at Battlehawk Armory | |
| Faxon Firearms | $169.00checked Nov 13, 2026 | Check store | Buy at Faxon Firearms | |
| AR15Discounts 5% off | $171.00checked Nov 12, 2026 | Check store | Buy at AR15Discounts | |
| Dirty Bird | $171.00checked Nov 12, 2026 | Check store | Buy at Dirty Bird | |
| GrabAGun | $171.00Salechecked Nov 12, 2026 | Check store | Buy at GrabAGun | |
| Palmetto State Armory | $171.99checked Nov 13, 2026 | Check store | Buy at Palmetto State Armory |
Prices and availability change often, so confirm on the store's site before you buy. We may earn a commission from these links.
Price history
Lowest in-stock price in the last 30 days: $161.00 at Brownells. Dashed line = out of stock. Tracking since Sep 27, 2026.
Show the prices as a table
| Store | Latest | Lowest | Highest |
|---|---|---|---|
| AR15Discounts | $171.00 | $171.00 | $171.00 |
| Ammunition Depot | $184.99 | $171.00 | $184.99 |
| Battlehawk Armory | $131.45 | $131.45 | $137.27 |
| Brownells | $161.00 | $161.00 | $161.00 |
| Dirty Bird | $171.00 | $171.00 | $171.00 |
| Faxon Firearms | $169.00 | $169.00 | $169.00 |
| GrabAGun | $171.00 | $171.00 | $171.00 |
| GunMag Warehouse | $171.99 | $171.99 | $171.99 |
| MidwayUSA | $171.00 | $171.00 | $171.00 |
| OpticsPlanet | $171.00 | $153.90 | $171.00 |
| Palmetto State Armory | $171.99 | $161.99 | $171.99 |
Since Sep 27, 2026.
About this part
The 16" Gov'T/Socom 5.56 NATO Mid-Length 4150 QPQ is a 16" 5.56 / .223 barrel from Faxon Firearms with a mid-length gas system. It's sold by 11 stores (5 in stock), from $131.45 to $184.99. The lowest in-stock price in the last 30 days was $161.00 at Brownells.
From the manufacturer
Faxon’s Gov’t / SOCOM 5.56 AR-15 barrel profile is a mix of the standard M4 profile and a heavy profile - skinny behind the gas block with a thicker O.D. ahead of it for a good balance of rigidity (for accuracy) and manageable weight. Machined from 4150 CMV carbon steel for an excellent balance accuracy and longevity, and QPQ Nitride coated inside and out for amazing corrosion resistance and durability.
All Faxon Gov’t / SOCOM 5.56 AR-15 barrels are fully stress-relieved, air-gauge tested, and individually checked for headspace by precision custom hardened gauges. They are put through a battery of tests at each operation until they a final inspected and allowed out the door.
- Rifling: 1-8" twist, button rifled
- Profile: Gov't/SOCOM
- Inside Finish: QPQ Nitride
- Outside Finish: QPQ Nitride
- Muzzle Thread: 1/2"-28 tpi
- Gas Block Shoulder Diameter: .750"
- Gas Port Diameter: .081"
- Gas Block Journal Length: 1.9"
- Magnetic Particle Inspected!
- 11-degree Target Crown
All Gov’t / SOCOM 5.56 AR-15 have M4-type feed ramps in the barrel extension to aid in reliable chambering of each round.
Big Book Catalog, Issue:70, Page:018
Big Book Catalog, Issue:70, Page:019
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