Product DescriptionThe FN FN15 Military Collector M4 Stripped Lower Receiver is built for shooters and collectors seeking an authentic foundation for an M4 or M16-style rifle build. Tailored after FN&';s U.S. military carbine production and made to FN&';s exacting specifications, this semi-automatic stripped lower receiver is forged from durable 7075-T6 aluminum, then machined and broached to precise MIL-SPEC standards before receiving an anodized black finish. It features M4 Carbine-style markings and is designed as a close reproduction of FN&';s military-pattern receivers, while the fire control housing is modified to block select-fire operation. This stripped lower is listed for M4/M16 applications and is associated with .223 Remington and 5.56 NATO configurations when paired with appropriate components.Product Highlights Forged from rugged 7075-T6 aluminum for strength, durability, and long-term reliability. Machined and broached to precise MIL-SPEC standards before anodizing for a consistent, authentic build foundation. FN Military Collector-style lower receiver with M4 Carbine markings for a faithful M4 or M16-style appearance. Anodized black finish helps resist wear while delivering a clean, professional look. Semi-automatic configuration with modified fire control housing to block select-fire operation. Specs Brand Name: FN Product Type: Stripped Lower Receiver Series: FN15 Military Collector Model: M4 Compatibility: For M4/M16 builds Material: 7075-T6 Aluminum Finish: Anodized Color: Black Action: Semi-automatic Associated Calibers: .223 Remington, 5.56 NATO Markings: M4 Carbine UPC: 845737017361 MPN: 20100821 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.