The White Label Armory WLA-PAC-1008-10 bolt catch detent spring is a precision-engineered replacement component designed for AR10 and AR15 platform rifles and pistols.White Label Armory WLA-PAC-1008-10 Bolt Catch Detent SpringCompatible with AR10 and AR15 platformsSilver finish for corrosion resistance10-pack quantity for multiple builds or replacementsPrecision manufactured for reliable bolt catch operationEssential for AR platform builds repairs and maintenance these detent springs ensure proper bolt catch function and weapon reliability for shooters builders and gunsmiths.