6mm ARC 1-7.5 Twist 20" Stainless Steel Barrel
$529.99 at GunMag Warehouse · 9 stores
In stock
Best price
$529.99at GunMag Warehouse
In stock 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
- 16" · Handguards
Specifications
- Manufacturer
- Proof Research
- Color
- Silver / Stainless
- Platform
- AR-15
- Caliber
- 6mm ARC
- Barrel length
- 16"
- Twist rate
- 1:7.5
- Thread pattern
- 5/8 x 24
Where to buy
| Store | Price | Availability | Buy | Add to build |
|---|---|---|---|---|
| GunMag Warehouse Best price | $529.99checked Nov 13, 2026 | In stock | Buy at GunMag Warehouse | |
| MidwayUSA | $564.63Salechecked Nov 13, 2026 | In stock | Buy at MidwayUSA | |
| OpticsPlanet | $649.00Salechecked Nov 13, 2026 | In stock | Buy at OpticsPlanet | |
| Battlehawk Armory | $572.25Salechecked Nov 13, 2026 | Check store | Buy at Battlehawk Armory | |
| GrabAGun | $579.99checked Nov 13, 2026 | Check store | Buy at GrabAGun | |
| Classic Firearms | $649.00checked Nov 13, 2026 | Check store | Buy at Classic Firearms | |
| Natchez | $649.00checked Nov 13, 2026 | Check store | Buy at Natchez | |
| Palmetto State Armory | $649.99checked Nov 13, 2026 | Check store | Buy at Palmetto State Armory | |
| Brownells 17.76% off · ends Nov 15 · exclusions apply | $649.00checked Nov 13, 2026 | Out of stock | Buy at Brownells |
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: $519.20 at MidwayUSA. Dashed line = out of stock. Tracking since Sep 28, 2026.
Show the prices as a table
| Store | Latest | Lowest | Highest |
|---|---|---|---|
| Battlehawk Armory | $572.25 | $572.25 | $572.25 |
| Brownells | $649.00 | $649.00 | $649.00 |
| Classic Firearms | $649.00 | $649.00 | $649.00 |
| GrabAGun | $579.99 | $579.99 | $579.99 |
| GunMag Warehouse | $529.99 | $529.99 | $649.99 |
| MidwayUSA | $564.63 | $519.20 | $649.00 |
| Natchez | $649.00 | $649.00 | $649.00 |
| OpticsPlanet | $649.00 | $649.00 | $649.00 |
| Palmetto State Armory | $649.99 | $649.99 | $649.99 |
Since Sep 28, 2026.
About this part
The 6mm ARC 1-7.5 Twist 16" Stainless Steel Barrel is a 16" 6mm ARC barrel from Proof Research. It's sold by 9 stores (3 in stock), from $529.99 to $649.99. The lowest in-stock price in the last 30 days was $519.20 at MidwayUSA.
From the manufacturer
Proof Research makes their steel barrels in-house with the exact same commitment to quality and repeatability as employ on their carbon fiber barrels. The drilling, rifling, and lapping process is identical to their composite barrels. They start with the same steel as they use in the carbon fiber barrels. It is a double stress-relieved 416R stainless steel, a pre-hardened chromium stainless steel that was specifically designed by engineers in collaboration with rifle barrel makers to provide the consistent, high quality and durability the firearms industry demands. Mfg: Proof Research
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