Armed Ops Tactical 45 Degree Offset FLIP UP Micro Series Precision Machined Anodized Aluminum Automatic Deploy Weaver Picatinny Front and Rear Combo Set Backup Ar15 Ar-15 M16 M4 M-4 Back up Iron Sights Mount Armed Ops Tactical Series Sights are canted at 45 Degrees For No Obstruction for those close up shots Picatinny rail mounting system for both right and left handers Level 3 Mil Spec Hard Anodized Military Grade Attaches To A Milspec 1913 Picatinny Rail Spring-loaded sights deploy at the push of a button to provide instant backup sighting