Developed from the operational experience of the Magpul DynamicsSM team, the B, A, D, Lever Battery Assist Device is designed to considerably improve the speed and efficiency of the AR15M16 bolt catch, The B, A, D, Lever quickly addresses reloading and malfunction clearance shortcomings of AR15M16 platforms by extending a paddle to the right side of the weapon, allowing manipulation of the bolt stop from the fire controlready position with the righthand trigger finger, Made from milspecanodized aluminum, the B, A, D, Lever attaches to the standard AR15M16 bolt release without permanent modification to the weapon, Functional for both left and righthanded shooters, the B, A, D, Lever also allows traditional bolt catch manipulation according to the AR15M16 manual of arms, All mounting hardware included, Not compatible with 7, 62 x 51 , 308 Winchester firearms as well as most AR15 billet or polymer lower and upper receivers due to their larger andor nonstandard dimensions including the S and W Magpul Spec Series lowers, Color: Black, Made in USA, Compatible with standard milspec forged AR15M16 receivers, Thin, antisnag profile and textured surface still allows for traditional manipulation of the bolt catch while maintaining unobstructed access to the trigger, asy attachment to the existing bolt catch paddle via one screw, Machined from durable billet 6061T6 aluminum, Finished with MILA8625F, Type III, Class 2 hard anodizing with manganese phosphate on the screw per MILDTL16232G, Torx mounting screw with Nyloc Blue patch prevents back out under recoil Torx wrench included, SKU: TCLGR1529