COLT .223 REM/.5.56MM NATO BOLT REPAIR KIT FOR AR-15/M4 The Colt AR-15/M4 Bolt Repair Kit is a streamlined set of critical, high-wear bolt carrier group components designed to keep your rifle cycling smoothly when parts fatigue or fail. Built to Colt's military specifications, each piece in this kit restores reliable extraction, ejection, and lockup-making it an ideal addition to any armorer's bench, range bag, or field repair setup. With genuine Colt manufacturing and a durable black finish, this kit ensures your AR15/M4 maintains consistent performance under hard use. SPECS Platform: AR-15 / M4 Color: Black Compatibilit Mfg: Colt