Product Description The TAPCO AR-15 Lower Parts Kit includes the essential components needed to assemble an AR-15 lower receiver using quality steel parts designed for durability. Built to be highly wear-resistant for sustained use, many components feature a black phosphate finish to help provide corrosion protection during extended shooting sessions. Product Highlights Complete AR-15 lower receiver parts kit for building or refurbishing a lower assembly Quality steel components engineered for wear resistance under continuous firing Black phosphate finish on many parts helps improve corrosion protection Includes key pins, springs, detents, selector, bolt catch parts, and magazine catch components Ideal for AR-15 platform lower receiver assembly and maintenance Specs Brand: Tapco Manufacturer Part Number: TAP22037 UPC: 810122800309 Platform: AR-15 Color/Finish: Black (black phosphate on many parts) Material: Steel Included Components: Takedown/Pivot Pin Detents (2); Bolt Catch Spring (1); Safety Detent Pin (1); Bolt Catch Plunger (1); Bolt Catch Roll Pin (1); Buffer Retention Pin (1); Trigger Pins, 5.56 (2); Safety Detent Spring (1); Spring for Buffer Retainer, 5.56 (1); Springs for Takedown/Pivot Detents, 5.56 (2); Spring for Mag Catch (1); Bolt Catch (1); Safety Selector, 5.56 (1); Magazine Catch Button, 5.56 (1); Magazine Catch, 5.56 (1); Pin for Receiver Pivot, 5.56 (1); Pin for Receiver Takedown, 5.56 (1) Disclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product&&';;s manufacturer.