The Proof Research Proof Bbl Ss Bolt 22wmr Di 20 Zermatt Comp 1-16 combines precision engineering with a lightweight, competitive contour designed for rimfire enthusiasts who demand consistent accuracy and fast handling, featuring a RimX action, a 20-inch barrel, and a 1/2-28 muzzle thread for versatile muzzle devices. Built for the 22 WMR cartridge, this rifle component showcases a 16 twists rate and a competition-profile contour that delivers steady, repeatable performance in high-volume practice or field competition, while the substantial yet manageable 5lbs-15oz weight helps maintain swing and stability during rapid follow-up shots. The Di platform emphasizes disciplined lockup and smooth operation, enabling reliable cycling and predictable point-of-impact shifts across varied temperatures and shooting positions. With Proof Researchs renowned craftsmanship, this barrel assembly complements precision builds aiming for tight groups and crisp recoil control, making it an ideal upgrade or foundation for custom rifles that seek race-ready accuracy in a compact RimX-based configuration. This combination of caliber suitability, optimized threading, and balance makes it a compelling choice for serious shooters pursuing disciplined, long-range rimfire performance.