Proof Research AR Steel .22 ARC Threaded Rifle Barrel 18 inch Rifle +1 Length 1-7 Twist 5/8-24 Stainless Steel
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$649.00at OpticsPlanet
Out of stock Sale checked Oct 21, 2026
In stock now instead
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- AR 308 PR-10 Barrel 6.5 Creedmoor Camgas Gas System SS - 6.5 Cr… $649.00at OpticsPlanet
- BSF Barrels AR-10 6.5mm Creedmoor Threaded AR Barrel 5/8x24 1-8… $639.56at MidwayUSA
Where to buy
| Store | Price | Availability | Buy | Add to build |
|---|---|---|---|---|
| OpticsPlanet | $649.00Salechecked 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 | $649.00 | $649.00 | $649.00 |
Since Oct 17, 2026.
About this part
The Proof Research AR Steel .22 ARC Threaded Rifle Barrel 18 inch Rifle +1 Length 1-7 Twist 5/8-24 Stainless Steel is an 18" 6.5 Creedmoor barrel from Proof Research. One store lists it, OpticsPlanet at $649.00.
Fits and works with
- Caliber
- 6.5 Creedmoor · Shop matching ammo
- Bolt
- AR-10 (.308 / 6.5 CM) · Bolt carrier groups
- Muzzle thread
- 5/8x24 · Muzzle devices
- Barrel length
- 18" · Handguards
Specifications
- Manufacturer
- Proof Research
- Platform
- AR-10
- Caliber
- 6.5 Creedmoor
- Barrel length
- 18"
- Thread pattern
- 5/8 x 24
From the manufacturer
Proof Research AR Steel .22 ARC Threaded Rifle Barrel 18 inch Rifle +1 Length 1-7 Twist 5/8-24 Stainless Steel. The Caliber Matched Gas System (CAMGAS) results in a gas system that is tuned specifically for the cartridge and length of the barrel. The AR-15 Platform was originally designed around the 223REM and 5.56NATO cartridges and the AR-10 was designed around the 308 Win/7.62NATO round. With higher performance cartridge such as the 6.5 Creedmoor the bore pressure remains higher further down the barrel. By moving the port location Proof Research ensures that the gas system pressure is the same as what the AR platforms were originally designed around. The result is a recoil impulse that is noticeably softer less fouling in the receiver increased reliability of extraction and less wear and tear on brass. This helps keep you on target and shooting while taking advantage of the latest high performance cartridges. Specifications for Proof Research AR Steel .22 ARC Threaded Rifle Barrel: Manufacturer: Proof Research Color: Stainless Steel Caliber: .22 ARC (Advanced Rifle Cartridge) Gas Block Journal Size-Diameter: .750 in Firearms Threads Per Inch: 5/8x24 Barrel Twist Rate: 1-7 Barrel Material: Steel Flutes: No Gun Make: AR Platform Gun Model: AR-15 Gun Type: Rifle Weight: 2.15 lb Gas Block Journal Size-Length: 1 in Application: Shooting Features of Proof Research AR Steel .22 ARC Threaded Rifle Barrel Lightweight - Up to 64percent lighter than traditional steel barrels of similar contour Extreme Temperature Resistance - Improved heat dissipation for cooler and longer lasting barrels Unprecedented Durability - Wrapped with high-strength aerospace-grade carbon fiber impregnated with a proprietary matrix resin Long-Lasting - Excellent erosion wear characteristics and corrosion resistance Extreme Pressure Resistance - An optimum combination of high tensile strength along with requisite toughness to withstand extreme chamber pressures encountered during firing Package Contents: Proof Research AR Steel .22 ARC Threaded Rifle Barrel What firearm models does the manufacturer say Proof Research AR Steel .22 ARC Threaded Rifle Barrel is compatible with? The manufacturer suggests that Proof Research AR Steel .22 ARC Threaded Rifle Barrel is compatible with AR-15Proof Research 143476: AR Steel .22 ARC Threaded Rifle Barrel 18 inch Rifle +1 Length 1-7 Twist 5/8-24 Stainless Steel 143476
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