Stern Defense 015SD 45 ACP 16.10" Upper Receiver with M-LOK, Black Melonite - 015SD15INCHMOD5MLOK161

This is a complete upper receiver assembly chambered in .45 ACP featuring a 16.10" black melonite barrel made from 4150 chrome moly steel and a 7075-T6 aluminum anodized receiver. The upper is designed for AR-platform builds and includes M-LOK mounting slots for accessory attachment. Ships as a complete upper assembly ready for installation onto a compatible lower receiver.