The Magpul CTR (Compact/Type Restricted) is a drop-in replacement buttstock designed for AR15/M16 carbines using mil-spec sized receiver extension tubes. Built for light fast action with enhanced weapon stability.Magpul CTR Carbine Stock - Mil-Spec ModelMounts on mil-spec sized receiver extension tubeSupplemental friction lock system minimizes stock movementShielded release latch prevents accidental activationAmbidextrous QD sling mount accepts push-button sling swivelsStandard 0.30" thick rubber butt-pad for positive shoulder purchaseStreamlined A-frame profile avoids snaggingRemovable butt-pad designIdeal for tactical applications the CTR provides enhanced weapon stability and reliable performance even with body armor or modular gear configurations.