AR-15/ 308 AR Carbon Fiber Barrels - 300 AAC Blackout 1-8 Twist 16" Carbon Fiber Barrel
$999.00 at MidwayUSA · 8 stores
In stock
Best price
$999.00at OpticsPlanet
In stock Sale checked Nov 13, 2026
Fits and works with
- Caliber
- 300 Blackout · Shop matching ammo
- Bolt
- Standard AR-15 (5.56 / 300 BLK / .350 Legend) · Bolt carrier groups
- Muzzle thread
- 5/8x24 · Muzzle devices
- Barrel length
- 12.5" · Handguards
Specifications
- Manufacturer
- Proof Research
- Color
- Silver / Stainless
- Platform
- AR-15
- Caliber
- 300 Blackout
- Barrel length
- 12.5"
- Thread pattern
- 5/8 x 24
Where to buy
| Store | Price | Availability | Buy | Add to build |
|---|---|---|---|---|
| OpticsPlanet Best price | $999.00Salechecked Nov 13, 2026 | In stock | Buy at OpticsPlanet | |
| Ammunition Depot | $999.00checked Nov 13, 2026 | In stock | Buy at Ammunition Depot | |
| Brownells 17.76% off · ends Nov 15 · exclusions apply | $999.99checked Nov 13, 2026 | In stock | Buy at Brownells | |
| GrabAGun | $889.99Salechecked Nov 13, 2026 | Check store | Buy at GrabAGun | |
| Dirty Bird | $899.00checked Nov 13, 2026 | Check store | Buy at Dirty Bird | |
| Battlehawk Armory | $899.25Salechecked Nov 13, 2026 | Check store | Buy at Battlehawk Armory | |
| AR15Discounts 5% off | $949.00checked Nov 13, 2026 | Check store | Buy at AR15Discounts | |
| Classic Firearms | $999.00checked Nov 13, 2026 | Check store | Buy at Classic Firearms | |
| Palmetto State Armory | $999.99checked Nov 13, 2026 | Check store | Buy at Palmetto State Armory | |
| MidwayUSA | $949.05Salechecked Oct 21, 2026 | Out of stock | Buy at MidwayUSA |
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: $949.05 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 | $999.00 | $999.00 | $999.00 |
| Battlehawk Armory | $899.25 | $899.25 | $899.25 |
| Brownells | $999.99 | $999.99 | $999.99 |
| Classic Firearms | $999.00 | $999.00 | $999.00 |
| Dirty Bird | $899.00 | $899.00 | $899.00 |
| GrabAGun | $889.99 | $889.99 | $889.99 |
| MidwayUSA | — | $949.05 | $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 300 AAC Blackout 1-7 Twist 12.5" Carbon Fiber Barrel is a 12.5" 300 Blackout barrel from Proof Research. It's sold by 10 stores (3 in stock), from $889.99 to $999.99. The lowest in-stock price in the last 30 days was $949.05 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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