Mono Ball Bearing - 5/8 ID x 1.1875 OD

The Mono Ball Bearing - 5/8 ID x 1.1875 OD (QA1 COM10) is a precision component engineered for high-stress applications in tactical firearms, military equipment, and heavy-duty mechanical systems. This ball bearing serves as a critical load-bearing element in firearm actions, recoil systems, and stabilization platforms where smooth cycling and reliable performance under sustained use are non-negotiable. Law enforcement and military operators depend on precision bearings like this to maintain the reliability of their equipment in the field, where component failure is not an option.

Manufactured by QA1, a leader in precision bearing and suspension component production, this mono ball bearing features a 5/8-inch inner diameter and 1.1875-inch outer diameter, optimized for compact mounting in confined spaces while maintaining robust load capacity. The bearing's design minimizes friction and wear during repetitive cycling, translating to extended service life and consistent function across thousands of rounds or operational cycles. QA1's manufacturing standards ensure tight tolerances and smooth rolling characteristics that eliminate binding and promote fluid mechanical action, critical for weapons platforms and tactical equipment that demand zero compromise.

This bearing is ideal for gunsmiths, armors, and maintenance personnel servicing AR-pattern rifles, precision bolt guns, and other modular tactical systems where bearing replacement or upgrade is part of custom builds or component refurbishment. It integrates seamlessly into OEM and aftermarket actions designed around QA1 specifications, providing drop-in compatibility for those familiar with QA1's product ecosystem. Whether you're building a precision rifle, repairing duty weapons, or maintaining crew-served equipment, the Mono Ball Bearing ensures your mechanical systems perform with the reliability and smoothness professionals expect.