SLR B15 Billet Upper 5.56 Receiver Black SLRB-15-UPP 556. 56 Billet Upper Receiver is a precise high-quality upper receiver that will boost your rifle build by several notches. SLR Machine and Tool designed these AR15 Upper Receivers with Mil-Spec dimensions and a Type 3 Mil-Spec hard coat so that the upper holds up under all conditions. The SLR M-15 B15 Billet Upper 5.56 Receiver is incredibly lightweight weighing in at 7.6 oz. to make it easier to carry in the field or pack for your next adventure. Grab your SLR M-15 B15 Billet Upper 5.56 Receiver to build a powerful firearm with premium parts. Specifications for SLR-B15 Billet Upper 5.56 Receiver: Manufacturer: SLR Color: Black Finish: Matte Fabric/Material: Alluminum Alloy Caliber: 5.56x45mm NATO Gun Model: AR-15 Condition: New Features of SLR SLR-B15 Billet Upper 5.56 Receiver: SLR-B15 Billet Upper Receiver. Machined in house from 7075 Billet. Mil-Spec dimensions. Type 3 Mil-Spec Hard Coat. Black Billet Shell Deflector included. 7.6 oz. Included Accessories: Door Assembly Black Billet Shell Deflector Package Contents: SLR-B15 Billet Upper 5.56 Receiver What firearm models does the manufacturer say SLR-B15 Billet Upper 5.56 Receiver is compatible with? The manufacturer says that SLR-B15 Billet Upper 5.56 Receiver is compatible with AR-15SLR SLRB-15-UPP 556: B15 Billet Upper 5.56 Receiver Black