Proof Research: 22 ARC Stainless Steel, AR Barrel, 4 Groove, 1 - 7 Twist, 5/8-24 Thread, 16"

Proof Research has designed its AR barrels with the goal of improving performance and reliability in the AR platform. Proof Research's 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 cartridges like 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 extraction reliability, 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:

• Length: 16" 
• 4 groove rifling
• Chamber: 22 ARC
• Twist rate: 7 
• Gas system length: Rifle 
• Gas block channel size: .750 
• Muzzle threading: 5/8-24 
• Weight: 2lbs-12oz 

Disclaimers:

• Barrels are guaranteed for headspacing to the specifications of the JP Enterprise Enhanced Bolt.
• It is recommended to double-check and ensure proper headspace before firing your rifle.
• Proof Research recommends the use of full-mass components throughout (full-mass bolt, buffer, and springs).
• 6.5 Grendel, 22 ARC, and 6 ARC barrels are designed for operation using a Grendel Type II bolt.