FEATURES:Ambidextrous Finish: Matte Black AnodizingCenter Spread: 4.7" Overall Length: 7.458" Height: .575" (Top of Receiver to Top of Picatinny) Weight: 2 oz. Torque Specs: 20 in/lbs Mounting Hardware: #6-48 X 1/4 Screws and T-10 Bit IncludedPRODUCT SPECIFICATIONS:Dimension 0.95 X 3.45 X 8.45Height 0.9500Width 3.4500Length 8.4500STYLE PICATINNYFINISH BLACK MATTEMATERIAL ALUM ALLOYTYPE OF RINGS NEEDED MIL-STD 1913 PICATINNYRINGS INCLUDED NOTHER FEATURES: MADE IN USA, MOSSBERG 100 ATR LONG ACTION, BOLT ACTION, 4X4 PICATINNY RAIL MOUNT