Proof Research PR15 Stainless Steel 12.5in 300BLK Pistol Length Rifle Barrel 30cal 0.75GB 7 Twist 5/8 x 24
$649.00 at OpticsPlanet · 2 stores
In stock Sale
Proof Research AR-15 300 Blackout Threaded AR Barrel Standard Standard 12.5 in Gas Length Pistol 7 Twist Pxt 2.8 Weight Silver
No ratings yetBest price
$749.00at OpticsPlanet
Out of stock Sale checked Oct 21, 2026
In stock now instead
- Proof Research PR15 Stainless Steel 12.5in 300BLK Pistol Length… $649.00at OpticsPlanet
- AR-15/ 308 AR Stainless Steel Barrels - 300 AAC Blackout 1-8 Tw… $569.99at GunMag Warehouse
- BSF Barrels AR-15 .300 AAC Blackout Threaded Barrel 14.5in Pist… $602.68at MidwayUSA
Where to buy
| Store | Price | Availability | Buy | Add to build |
|---|---|---|---|---|
| OpticsPlanet | $749.00Salechecked Oct 21, 2026 | Out of stock | Buy at OpticsPlanet |
Prices and availability change often, so confirm on the store's site before you buy. We may earn a commission from these links.
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Price history
Dashed line = out of stock. Tracking since Oct 17, 2026.
Show the prices as a table
| Store | Latest | Lowest | Highest |
|---|---|---|---|
| OpticsPlanet | $749.00 | $749.00 | $749.00 |
Since Oct 17, 2026.
About this part
The Proof Research AR-15 300 Blackout Threaded AR Barrel Standard Standard 12.5 in Gas Length Pistol 7 Twist Pxt 2.8 Weight Silver is a 12.5" 300 Blackout barrel from Proof Research. One store lists it, OpticsPlanet at $749.00.
Fits and works with
- Caliber
- 300 Blackout · Shop matching ammo
- Bolt
- Standard AR-15 (5.56 / 300 BLK / .350 Legend) · Bolt carrier groups
- Barrel length
- 12.5" · Handguards
Specifications
- Manufacturer
- Proof Research
- Platform
- AR-15
- Caliber
- 300 Blackout
- Barrel length
- 12.5"
From the manufacturer
Proof Research AR-15 300 Blackout Threaded AR Barrel Standard Standard 12.5 in Gas Length Pistol 7 Twist Pxt 2.8 Weight Silver. PXT - PROOF Exponential Twist - is a complete rethinking of conventional rifling geometry and twist progression engineered to reduce engraving force minimize throat erosion and create a smoother transition as the projectile engages the rifling. Specifications for Proof Research AR-15 300 Blackout Threaded AR Barrel: Manufacturer: Proof Research Fabric/Material: Stainless Steel Caliber: .300 AAC Blackout Barrel Profile: Standard Barrel Material: Stainless Steel Flutes: No Gun Make: AR Platform Gun Model: AR-15 Gun Type: Rifle Firearms Threads Per Inch: 5/8x24 Package Contents: Proof Research AR-15 300Blk Threaded AR Barrel What firearm models does the manufacturer say Proof Research AR-15 300 Blackout Threaded AR Barrel is compatible with? The manufacturer suggests that Proof Research AR-15 300 Blackout Threaded AR Barrel is compatible with AR-15Proof Research 157176: AR-15 300 Blackout Threaded AR Barrel Standard Standard 12.5 in Gas Length Pistol 7 Twist Pxt 2.8 Weight Silver
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