Stub Shaft Bearing

The stub shaft bearing from DIVERSIFIED MACHINE (model RRC-1625) is a precision steel component engineered for XR quick-change weapon systems used in tactical, law enforcement, and military applications. This lower shaft bearing is essential for shooters who demand reliable, repeatable performance when swapping barrels or reconfiguring modular platforms. The stub shaft bearing serves as a critical pivot point in quick-change mechanisms, ensuring precise alignment and durability under high-round-count conditions.

Manufactured from hardened steel, the stub shaft bearing is designed to withstand the mechanical stresses and tolerances demanded by professional-grade firearms platforms. The bearing's compact footprint (3.85 x 1.3 x 5.05 inches) and lightweight construction (0.96 lbs) make it suitable for integration into modular quick-change systems without adding unnecessary bulk. Steel construction provides superior wear resistance compared to aluminum alternatives, extending service life across thousands of barrel changes and ensuring that mechanical fit remains tight and repeatable over years of operational use.

This bearing is ideal for operators running XR quick-change platforms who require dependable component replacement or repair parts. Law enforcement precision rifle teams, military armorers, and civilian shooters building custom tactical rifles benefit from the stub shaft bearing's ability to maintain dimensional consistency and smooth operation. Installation requires proper alignment with the quick-change assembly—ensure compatibility with your specific platform before ordering. Replacement or spare stub shaft bearings are essential inventory items for active shooters and gunsmithing operations that support high-volume training and deployment schedules.