Product Description The Spike&';s Tactical Generation 2 Billet Upper is a mil-spec style AR-15 upper receiver designed for .223 Remington / 5.56 NATO builds. Machined in a billet profile with an integrated top Picatinny rail, it provides a rigid, precise foundation for assembling a reliable upper receiver group. Finished in black and designed around a mil-spec barrel nut interface, it&&';;s well-suited for custom builds, upgrades, and replacement applications. Product Highlights Generation 2 billet-style AR-15 upper receiver for .223 Remington / 5.56 NATO platforms Mil-spec barrel nut interface for broad build compatibility Integrated top Picatinny rail for optics and accessory mounting Black finish to match common AR components and build aesthetics Ideal for builders seeking a rigid, precision-machined upper receiver foundation Specs Brand: Spike&';s Tactical Type: Upper Receiver Model/Generation: Generation 2 Construction: Billet Caliber Compatibility: .223 Remington / 5.56 NATO Color: Black Barrel Nut Interface: Mil-Spec Manufacturer Part Number: SFT52B2 UPC: 810083267760 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.