Proof Research AR Steel 6mm ARC Threaded Rifle Barrel 22 inch Rifle +1 Length 1-7.5 Twist 5/8-24 Stainless Steel
No ratings yetBest price
$649.00at OpticsPlanet
In stock Sale 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
- 22" · Handguards
Specifications
- Manufacturer
- Proof Research
- Color
- Silver / Stainless
- Platform
- AR-15
- Caliber
- 6mm ARC
- Barrel length
- 22"
- Twist rate
- 1:7.5
- Thread pattern
- 5/8 x 24
- Weight
- 34.4 oz
Where to buy
| Store | Price | Availability | Buy | Add to build |
|---|---|---|---|---|
| OpticsPlanet Best price | $649.00Salechecked Nov 13, 2026 | In stock | Buy at OpticsPlanet | |
| MidwayUSA | $649.00checked Nov 13, 2026 | In stock | Buy at MidwayUSA | |
| Battlehawk Armory | $572.25checked Oct 28, 2026 | Check store | Buy at Battlehawk 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: $538.67 at MidwayUSA. Dashed line = out of stock. Tracking since Oct 12, 2026.
Show the prices as a table
| Store | Latest | Lowest | Highest |
|---|---|---|---|
| Battlehawk Armory | — | $572.25 | $572.25 |
| MidwayUSA | $649.00 | $538.67 | $649.00 |
| OpticsPlanet | $649.00 | $649.00 | $649.00 |
Since Oct 12, 2026.
About this part
The Proof Research AR Steel 6mm ARC Threaded Rifle Barrel 22 inch Rifle +1 Length 1-7.5 Twist 5/8-24 Stainless Steel is a 22" 6mm ARC barrel from Proof Research. It's sold by 3 stores (2 in stock), from $572.25 to $649.00. The lowest in-stock price in the last 30 days was $538.67 at MidwayUSA.
From the manufacturer
Proof Research AR Steel 6mm ARC Threaded Rifle Barrel 22 inch Rifle +1 Length 1-7.5 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 6mm ARC Threaded Rifle Barrel: Manufacturer: Proof Research Color: Stainless Steel Caliber: 6mm ARC Barrel Length: 22 in Gas System Length: Rifle +1 Length Gas Block Journal Size-Diameter: .875 in Firearms Threads Per Inch: 5/8x24 Barrel Twist Rate: 1-7.5 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 6mm 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 6mm ARC Threaded Rifle Barrel What firearm models does the manufacturer say Proof Research AR Steel 6mm ARC Threaded Rifle Barrel is compatible with? The manufacturer says that Proof Research AR Steel 6mm ARC Threaded Rifle Barrel is compatible with AR-15Proof Research 143674: AR Steel 6mm ARC Threaded Rifle Barrel 22 inch Rifle +1 Length 1-7.5 Twist 5/8-24 Stainless Steel 143674
Rating
No ratings yet
Log in to rate this part.
Comments
Please log in to read and leave comments.
Similar barrels
6mm ARC 1-7.5 Twist 14.5" Stainless Steel Barrel
$579.99 at GunMag Warehouse · 4 stores
In stock
6mm ARC 1-7.5 Twist 20" Carbon Fiber Barrel
$729.99 at GunMag Warehouse · 10 stores
In stock
Helix 6 Precision Carbon Fiber 18in 6mm ARC Rifle+1 Rifle Barrel 243cal 0.75GB 1-7 Twist 5/8-24 Black
$649.99 at OpticsPlanet
In stock Sale
Noveske BARREL 6MM ARC 18 SPR STAINLESS .750 LO-PRO GAS BLOCK RIFLE LENGTH GAS TUBE HEADSPACED BOLT WITH PACKAGING
$615.00 at MidwayUSA · 5 stores
In stock
BSF Barrels AR-15 6mm ARC Threaded Barrel 12in Carbine Length 1-7.5 Twist 5/8x24 Gray
$599.99 at MidwayUSA · 2 stores
In stock Sale
BSF Barrels AR-15 6mm ARC Threaded Barrel 14.5in Mid Length 1-7.5 Twist 5/8x24 Gray
$599.99 at MidwayUSA · 2 stores
In stock Sale