Product Description The Sharps Bros The Jack Gen2 stripped lower receiver brings standout styling and rugged performance to your AR-15 build. Precision machined from 7075-T6 aluminum and finished in black anodizing, this multi-caliber marked lower features weight-reducing design updates and a threaded bolt catch pin for easier assembly. An oversized, integral trigger guard and a beveled/flared magazine well improve handling and reloads, while full compatibility with mil-spec AR-15 internal parts, mil-spec upper receivers, and common magazines (GI and PMAGs) keeps your build options wide open. Note: A lower parts kit, buffer, and stock are required to complete your build. Product Highlights Gen2 design with threaded bolt catch pin, reduced weight, and improved styling CNC machined from durable 7075-T6 aluminum for AR-15 lower receiver builds Black anodized finish for corrosion resistance and long-lasting wear Oversized integral trigger guard plus beveled, flared magwell for enhanced ergonomics Compatible with mil-spec AR-15 internal parts, mil-spec uppers, and GI/PMAG magazines Specs Product Type: Stripped Lower Receiver Platform: AR-15 Caliber Marking: Multi-Caliber Material: 7075-T6 Aluminum Finish: Black Anodized (Hardcoat Anodized) Notable Features: Threaded bolt catch pin; oversized integral trigger guard; beveled/flared magwell Compatibility: Mil-spec AR-15 internal parts; mil-spec upper receivers; GI magazines and PMAGs Weight: 10.7 oz Country of Manufacture: United States of America UPC: 850869008033 Manufacturer Part Number: SBLR03 Brand: SHARPS BROS LLC 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.