CMC Triggers Complete Lower Receiver Parts Kit for AR-15 is a great addition to your AR15 build. From amateur gun builder to seasoned expert gun smith, this lower parts kit is for you. Included: Bolt CatchBolt Catch PlungerBolt Catch SpringBolt Catch Roll PinMag ReleaseMag Release ButtonMag Release SpringBuffer Retainer SpringSafetyBuffer RetainerSafety Detent SpringSafety DetentTrigger GuardTrigger Guard Roll PinTake-down Detent SpringsTake-down DetentTake-down Pins#html-body [data-pb-style="62DF82896C5B6"]{justify-content: flex-start; display: flex; flex-direction: column; background-position: left top; background-size: cover; background-repeat: no-repeat; background-attachment: scroll; border-style: none; border-width: 1px; border-radius: 0px; margin: 0px 0px 10px; padding: 10px;}#html-body [data-pb-style="62DF82896C5C3"]{border-style: none; border-width: 1px; border-radius: 0px; margin: 0px; padding: 0px;}