Repair Cyl Sleeve 4.244 Bore x 4.500 OD x 7.760

The Repair Cyl Sleeve 4.244 Bore x 4.500 OD x 7.760 Height by DARTON SLEEVES is a precision honing sleeve engineered for rifle barrel reconditioning and repair operations. Built for armorer shops, military depot work, and serious gunsmith applications, this component enables restoration of damaged or worn bore dimensions to factory specifications. Whether you're managing a law enforcement armory or running a full-service gunsmith operation, this sleeve represents the gold standard in bore restoration technology used across tactical and military platforms.

Manufactured to exacting tolerances, the repair sleeve features a 4.244-inch bore diameter paired with a 4.500-inch outer diameter and 7.760-inch height, delivering the dimensional stability required for precision honing operations. The 1-8 twist configuration (as indicated by MPN RS4.250 1-8) accommodates .224-caliber rifle barrels—covering the most common military and civilian platforms. DARTON SLEEVES' reputation in barrel manufacturing ensures this sleeve maintains concentricity within industry standards, critical for achieving uniform bore dimensions and proper rifling engagement during restoration. The robust 3.89-pound construction provides the mass necessary to dampen vibration during honing cycles, directly translating to improved surface finish and dimensional accuracy.

This repair sleeve is indispensable for armorer shops facing high-round-count rifles that require bore restoration before rebarreling, and for military maintenance depots conducting barrel life assessments and refurbishment. Compatibility spans 5.56mm NATO platforms, .223 Remington match rifles, and specialized .224-caliber tactical systems where bore degradation has occurred. Installation requires standard honing equipment and barrel removal; the sleeve's precise dimensions ensure proper tool engagement without binding or chatter. Stock this component alongside your full-bore honing kit for rapid turnaround on damaged rifle barrels in operational environments.