Proof Research PXT AR Platform 6mm ARC Threaded AR Barrel 1.12oz 7.5 Twist Gas Length Rifle 16 in Silver
$749.00 at Sportsman's Warehouse · 5 stores
In stock
Best price
$879.12at MidwayUSA
In stock Sale checked Nov 13, 2026
Fits and works with
- Caliber
- 6mm ARC · Shop matching ammo
- Bolt
- 6.5 Grendel / 6mm ARC · Bolt carrier groups
- Muzzle thread
- 5/8x24 · Muzzle devices
- Barrel length
- 18" · Handguards
Specifications
- Manufacturer
- Proof Research
- Color
- Gray
- Platform
- AR-15
- Caliber
- 6mm ARC
- Barrel length
- 18"
- Twist rate
- 1:7.5
- Thread pattern
- 5/8 x 24
Where to buy
| Store | Price | Availability | Buy | Add to build |
|---|---|---|---|---|
| MidwayUSA Best price | $879.12Salechecked Nov 13, 2026 | In stock | Buy at MidwayUSA | |
| Brownells 17.76% off · ends Nov 15 · exclusions apply | $997.99checked Nov 13, 2026 | In stock | Buy at Brownells | |
| OpticsPlanet | $999.00Salechecked Nov 13, 2026 | In stock | Buy at OpticsPlanet | |
| Battlehawk Armory | $831.99Salechecked Nov 13, 2026 | Check store | Buy at Battlehawk Armory | |
| Dirty Bird | $899.00checked Nov 13, 2026 | Check store | Buy at Dirty Bird | |
| AR15Discounts 5% off | $949.00checked Nov 13, 2026 | Check store | Buy at AR15Discounts | |
| GrabAGun | $999.00Salechecked Nov 13, 2026 | Check store | Buy at GrabAGun | |
| Palmetto State Armory | $999.99checked Nov 13, 2026 | Check store | Buy at Palmetto State Armory | |
| Ammunition Depot | $951.49checked Oct 27, 2026 | Out of stock | Buy at Ammunition Depot | |
| GunMag Warehouse | $999.99checked Oct 14, 2026 | Out of stock | Buy at GunMag Warehouse |
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: $799.20 at MidwayUSA. Dashed line = out of stock. Tracking since Sep 27, 2026.
Show the prices as a table
| Store | Latest | Lowest | Highest |
|---|---|---|---|
| AR15Discounts | $949.00 | $949.00 | $949.00 |
| Ammunition Depot | — | $951.49 | $999.00 |
| Battlehawk Armory | $831.99 | $831.99 | $858.00 |
| Brownells | $997.99 | $997.99 | $997.99 |
| Dirty Bird | $899.00 | $899.00 | $899.00 |
| GrabAGun | $999.00 | $999.00 | $999.00 |
| GunMag Warehouse | — | $999.99 | $999.99 |
| MidwayUSA | $879.12 | $799.20 | $999.00 |
| OpticsPlanet | $999.00 | $999.00 | $999.00 |
| Palmetto State Armory | $999.99 | $999.99 | $999.99 |
Since Sep 27, 2026.
About this part
The 6mm ARC 7.5 Twist 18" Carbon Fiber Barrel is an 18" 6mm ARC barrel from Proof Research. It's sold by 10 stores (3 in stock), from $831.99 to $999.99. The lowest in-stock price in the last 30 days was $799.20 at MidwayUSA.
From the manufacturer
PROOF Research's match-grade carbon fiber barrels are stronger, lighter, and as accurate as the finest precision steel barrels and will maintain their performance in the harshest conditions. Up to 64% lighter than traditional steel barrels Match-grade accuracy Improved heat dissipation for cooler and longer lasting barrels No point-of-impact shift during high-volume fire Reduced harmonic barrel vibration Unprecedented durability Mfg: Proof Research
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