Monstrum Shrapnel Series Micro Red Dot Picatinny Base Mount Compatible with Holosun 407k/507k/RMSc 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 Red Dot Picatinny Base Mount: Manufacturer: Monstrum Color: Black Finish: Black Fabric/Material: 6061 Aircraft Grade Aluminum Base/Mount Type: Top Rail Mount Red Dot Sights-Footprint: Holosun K Attachment Type: Picatinny Package Contents: Monstrum Shrapnel Series Micro Red Dot Picatinny Base Mount Monstrum ZD51C: Shrapnel Series Micro Red Dot Picatinny Base Mount Compatible with Holosun 407k/507k/RMSc Footprint