What's more American than building out your own AR-15 rifle? The SCO15 Upper Receiver features the SilencerCo logo, and is perfect for pairing with the SCO15 Lower Receiver. Precision machined from billet 7075 aluminum and finished in type III hardcoat anodize. Features a mil-spec 1913 picatinny rail. Compatible with mil-spec forward assists and dust covers (not included in purchase). *Lower receiver is not included. *Upper Finish disclaimer: SilencerCo uppers are finished with Type 3 hardcoat anodize, this process forms an extremely hard, abrasion resistant finish. While this finish provides superior results, it can cause some variance in the finish color. SilencerCo can't guarantee that a SCO-15 Lower will be an exact match with a SilencerCo upper. Color variations are not covered under warranty.