The Proof Research Pre-Fit Barrel is a carbon fiber-wrapped replacement barrel chambered in .22 LR, built in the Sendero contour as a drop-in pre-fit for the RimX rimfire action (Proof Research part no. 121566).

Key Specifications

• Chambered in .22 LR
• 18-inch barrel length
• 1-in-16 rate of twist
• 1/2-28 threaded muzzle
• Sendero contour
• Pre-fit for the RimX rimfire action
• Carbon fiber-wrapped construction
• Weighs approximately 2 lb 11 oz

Frequently Asked Questions

What action is this barrel built for? It’s a pre-fit drop-in built for the RimX rimfire action.

Is the muzzle threaded? Yes, it’s threaded 1/2-28 for a suppressor or muzzle device.

What’s the twist rate? It has a 1-in-16 rate of twist, standard for .22 LR.

Buy the Proof Research Pre-Fit Barrel, .22 LR, 18-Inch Sendero, RimX

Order the Proof Research Pre-Fit Barrel, .22 LR, 18-Inch Sendero, RimX from a Lubbock, TX gun shop. Shop more Proof Research parts or browse the Rifle Barrels category at Schaefer Defense.