Proof Research PXT AR Platform 6mm ARC Threaded AR Barrel 1.12oz 7.5 Twist Gas Length Rifle 16 in Silver
$749.00 at MidwayUSA · 2 stores
In stock
Best price
$799.20at MidwayUSA
In stock Sale checked Oct 21, 2026
Where to buy
| Store | Price | Availability | Buy | Add to build |
|---|---|---|---|---|
| MidwayUSA Best price | $799.20Salechecked Oct 21, 2026 | In stock | Buy at MidwayUSA | |
| Ammunition Depot | $951.49checked Oct 21, 2026 | In stock | Buy at Ammunition Depot | |
| Brownells | $997.99checked Oct 21, 2026 | In stock | Buy at Brownells | |
| OpticsPlanet | $999.00Salechecked Oct 21, 2026 | In stock | Buy at OpticsPlanet | |
| GunMag Warehouse | $999.99checked Oct 14, 2026 | In stock | Buy at GunMag Warehouse | |
| Battlehawk Armory | $831.99Salechecked Oct 21, 2026 | Check store | Buy at Battlehawk Armory | |
| Palmetto State Armory | $999.99Salechecked Oct 21, 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: $799.20 at MidwayUSA. Dashed line = out of stock. Tracking since Sep 27, 2026.
Show the prices as a table
| Store | Latest | Lowest | Highest |
|---|---|---|---|
| Ammunition Depot | $951.49 | $951.49 | $999.00 |
| Battlehawk Armory | $831.99 | $831.99 | $858.00 |
| Brownells | $997.99 | $997.99 | $997.99 |
| GunMag Warehouse | — | $999.99 | $999.99 |
| MidwayUSA | $799.20 | $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 7 stores (5 in stock), from $799.20 to $999.99. The lowest in-stock price in the last 30 days was $799.20 at MidwayUSA.
Fits and works with
- Caliber
- 6mm ARC · Shop matching ammo
- Bolt
- 6.5 Grendel / 6mm ARC · Bolt carrier groups
- Barrel length
- 18" · Handguards
Specifications
- Manufacturer
- Proof Research
- Platform
- AR-15
- Caliber
- 6mm ARC
- Barrel length
- 18"
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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