Product Description The M&P Accessories Customizable Lower Parts Kit is an ideal choice for building a custom AR-15 lower receiver. It provides the minor parts generally used in an AR-15 build while giving you the flexibility to incorporate popular aftermarket upgrades. This kit includes essential pins, detents, springs, and controls needed to complete key lower-receiver functions such as takedown, selector detent tension, magazine catch operation, and bolt catch operation. Product Highlights Customizable AR-15 lower parts kit designed to support custom-build flexibility with common aftermarket upgrades. Includes key lower components like bolt catch parts, magazine catch components, and buffer retainer parts. Comprehensive selection of pins, detents, and springs commonly required during AR-15 lower assembly. Made in the USA (per package labeling). Great for completing and refreshing AR-15 lower receiver small parts during a new build or maintenance. Specs Brand: M&P Accessories Manufacturer Part Number: 110115 UPC: 661120001270 Platform Compatibility: AR-15 Product Type: Lower Parts Kit Country of Manufacture: USA Included Components: Bolt catch, plunger, roll pin, spring; buffer retainer and spring; hammer pin; magazine catch, button, and spring; pivot pin, pin detent, and pin detent spring; selector detent and spring; takedown pin, pin detent, and pin detent spring; trigger pin 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.