Product Description The LanTac USA LLC M-SPEC Lower Parts Kit is a complete small-parts solution for building or servicing an AR-15 lower receiver. Manufactured to high quality standards, this kit includes key pins, detents, springs, and controlsincluding an ambidextrous safety selector and a bolt catch set screw designed to be compatible with LanTac, Aero, and other lowers. Ideal for new builds, replacements, or maintenance, the M-SPEC kit helps ensure proper fit and reliable function of your lower receiver components. Product Highlights Complete AR-15 lower receiver parts kit for builds, repairs, and replacements Includes an ambidextrous safety selector for enhanced control Bolt catch set screw (6-32) compatible with LanTac, Aero, and other lowers Includes 1/16th Allen key head for the bolt catch set screw Manufactured to high quality standards for dependable performance Specs Brand: LanTac USA LLC Model/Series: M-SPEC Compatibility: AR-15 Color/Finish: Black Manufacturer Part Number: 01-PKIT-LP UPC: 614347523841 Included Components: Takedown Pin; Pivot Pin; Pin Detent x2; Detent Spring x2; Ambidextrous Safety Selector; Safety Detent; Safety Detent Spring; Buffer Retainer; Buffer Retainer Spring; Bolt Catch; Bolt Catch Plunger Spring; Bolt Catch Plunger; Bolt Catch Roll Pin; Bolt Catch Set Screw (6-32); 1/16th Allen Key Head; Mag Catch; Mag Catch Spring; Mag Catch Button 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 products manufacturer.