you need the FAST™ Absolute Riser

making it an ideal choice for dynamic tactical environments

E&L and Bolt magazines

High strength reinforced design for better durability

M-LOK Rail

Atlas MRO Red Dot Sight with Killflash, 45-Degree Offset Mount Color:FDE you need the FAST™ AbsoluteSpecifications Brand Name: Atlas Material: Aluminum Battery: 1x CR2032 Net Weight: 145g Gross Weight: 230g Color: Tan Features Large viewing area Aluminum housing Ambidextrous brightness control with easy to set adjusters 8 levels of brightness Single CR2032 battery (battery not included) Offset mount for mounting an MRO red dot sight at a 45 degree angle next to the primary optics Able to attach to either the right or left side of the weapon Low