UTG High Profile 1" Riser Mount 3 Slot MT-RSX1S Riser mount for rifles with picatinny/ weaver rails 40mm top Picatinny rail with 3 slots Side plate with spring tension for quick, tool free installation Precision made from aircraft aluminum with matte black anodizing 25.4mm Saddle height with see-through design Length: 1.57"/40mm Weight: 49g