The AR-STONER(TM) Lower Pin and Spring Kit for the AR-15 platform is the perfect choice if you are looking to build your next AR-15. This kit includes a selection of the most common lost and misplaced mil-spec pins and springs in an AR-15 lower receiver. This kit is perfect for putting together a new rifle, rejuvenating an older gun or just keeping on hand for future AR-15 repairs.Includes:(2) Takedown and Pivot Pin Detent(2) Takedown and Pivot Pin Detent Spring(1) Disconnector Spring(1) Hammer Spring(1) Trigger Spring(1) Trigger Guard, Forward Assist Roll Pin(2) Hammer and Trigger Pin, Small Pin .154"(1) Bolt Catch Spring(1) Bolt Catch Plunger(1) Bolt Catch Roll Pin(1) Buffer Retainer Spring(1) Buffer Retainer(1) Safety Selector Detent(1) Safety Selector Detent Spring(1) Magazine Release SpringFeaturesStandard Mil-Spec Lower PartsSmooth OperationDependable Parts at an Unbeatable Price