Black Rain Ordnance Complete Upper Scout 5.56 Black. Their 5.56 Scout Complete AR15 Upper Receivers are top-of-the-line options that are built to last. Chambered in 5.56x45mm NATO and featuring a black anodized finish this complete upper receiver creates a high-quality durable weapon when you combine it with your choice of lower receiver. Specifications for Black Rain Ordnance Complete Upper Scout 5.56: Manufacturer: Black Rain Ordnance Caliber: 5.56x45mm NATO Finish: Anodized Color: Black Gun Model: AR-15 Magazine Included: No Features of Black Rain Ordnance Complete Upper Receiver Scout 5.56x45mm NATO: Black Anodized Finish Chambered in 5.56x45mm NATO Package Contents: Black Rain Ordnance Complete Upper Scout 5.56 What firearm models does the manufacturer say Black Rain Ordnance Complete Upper Scout 5.56 is compatible with? The manufacturer suggests that Black Rain Ordnance Complete Upper Scout 5.56 is compatible with AR-15Black Rain Ordnance BRO-SCOUT-CU-BLK: Complete Upper Scout 5.56 Black