The Proof Research RimX .22 LR SS Competition Barrel, 20.00" Threaded 1/2-28, Stainless is built for shooters who demand repeatable precision from their rimfire platforms. Purpose-made for RimX and Zermatt actions, this 20-inch stainless steel barrel uses a competition contour and a 1:16 twist rate to deliver consistent accuracy with quality .22 LR ammunition. The threaded 1/2-28 muzzle makes it ready for brakes or suppressors, while the clean, straight profile integrates smoothly into high-end builds.

This barrel is ideal for dedicated rimfire competition, serious range practice, and training where tight groups and predictable performance matter. Its stainless construction and carefully tuned twist rate help shooters stretch the capabilities of .22 LR on steel or paper targets. Backed by Proof Research’s reputation for advanced barrel technology and meticulous craftsmanship, it offers a refined upgrade for any RimX-based rifle.

• Manufacturer: Proof Research
• Model: RimX .22 LR SS Competition Barrel, 20.00" Threaded 1/2-28, Stainless
• Caliber: 22 LR
• Barrel Length: 20"
• Twist Rate: 1:16
• Muzzle Thread: 1/2-28
• Contour: Competition