Monstrum Shrapnel Series Micro RMR 407C/507C XR Footprint Red Dot Picatinny Base Mount RMR/SRO Footprint. Refer to compatibility chart to confirm compatibility with your micro red dot. Low profile mounting base with only 0.21 inches of rise between base of mount to red dot mounting surface Includes all necessary mounting hardware no gunsmithing required All Monstrum products come with a lifetime guarantee Specifications for Monstrum Shrapnel Series Micro RMR 407C/507C XR Footprint Red Dot Picatinny Base Mount: Manufacturer: Monstrum Color: Black Finish: Type III Hard Anodized Fabric/Material: Aluminum Base/Mount Type: Top Rail Mount Red Dot Sights-Footprint: RMR Attachment Type: Picatinny Weight: 0.05 lb Package Contents: Monstrum Shrapnel Series Micro RMR 407C/507C XR Footprint Red Dot Picatinny Base Mount Monstrum ZD50R: Shrapnel Series Micro RMR 407C/507C XR Footprint Red Dot Picatinny Base Mount RMR/SRO Footprint