Aim-O 551 Red Dot Black SR25 2 K implements a moving

2 K implements a moving slide and a robust gas blowback (GBB) system that imitates recoil and slide action during firing

The item uses a 1 x CR123 battery and includes three illumination modes that may be flexibly customized

and many low-profile forward QD Sling mounts

CNC machined from 6061-T6 aluminum alloy anodized with matte black coating

Product Highlights rear part mesh material

Aim-O 551 Red Dot Black SR25 2 K implements a movingThe 551 Red Dot, made by Aim O, is a high quality and solid replica of one of the market's most popular and widely used aiming devices. Special forces, law enforcement agencies, and competitive shooters employ it with huge success. This sight is compatible with rifles, carbines, shotguns, and submachine weapons fitted with a Picatinny rail interface system. The 551 device weighs 220g, uses 4 x LR44 batteries for reticle illumination, and is machined