CT1 Lower Shaft Bearing

The CT1 Lower Shaft Bearing by Diversified Machine is a precision-engineered component designed for the Bulldog Quick Change system, a robust modular platform favored by tactical operators, armorers, and military personnel who demand reliable component interchangeability. This steel bearing serves as a critical support element in quick-change weapon systems, where minimal tolerance for failure and maximum durability are non-negotiable. Whether you're outfitting a service rifle, maintaining legacy inventory, or rebuilding a platform, this bearing ensures smooth rotational function and extended operational life under demanding field conditions.

Constructed from hardened steel, the CT1 Lower Shaft Bearing is engineered to withstand cyclic stress and maintain concentricity under sustained use. The bearing's compact footprint—measuring 3.55 inches in length with a 1.1-inch width profile—integrates seamlessly into the Bulldog Quick Change receiver geometry without adding unnecessary bulk. Steel construction provides superior wear resistance compared to softer bearing materials, critical in modular systems where repeated assembly and disassembly cycles accelerate component fatigue. The bearing's rated load capacity and controlled surface finish are optimized to reduce binding while maintaining positional accuracy essential for barrel indexing and timing reliability.

This bearing replacement or upgrade suits gunsmiths performing Bulldog Quick Change system maintenance, armory technicians managing fleet inventory, and end-users seeking OEM-equivalent durability for precision rifle platforms. Installation requires basic mechanical competency and familiarity with quick-change architecture; professional installation is recommended for users unfamiliar with modular receiver assembly. At 0.98 pounds, the bearing's minimal weight addition maintains system balance and handling characteristics. Stock this component for preventive maintenance programs or repair cycles to minimize platform downtime in training or operational schedules.