Gray Ops CNC Brass Hybrid Weight Black. MLOK slots available on sides of weights for stacking weights on top of each other or adding accessories to the outside of the weight. Flush Cup location added for accessories such as the ''Sikes Clutch'' or sling attachments. Swap out the brass insert for aluminum if you want the width of the weight without adding weight Specifications for Gray Ops CNC Brass Hybrid Weight: Manufacturer: Gray Ops CNC Color: Black Fabric/Material: Machined steel Features of Gray Ops CNC Brass Hybrid Weight Each weight has Mlok locations and Flush cup location Package Contents: Gray Ops CNC Brass Hybrid Weight 2x Weights M-LOK Hardware Gray Ops CNC GO-HWB: Brass Hybrid Weight Black