This guide details the installation and zeroing process for the Brownells reproduction Colt 4x20 AR-15 scope, based on original 1970s blueprints. It covers mounting the scope onto an AR-15 carry handle and performing range adjustments using the BDC turret. The information is presented with high authority by Ian McCollum, a recognized expert in historical firearms.
This video announces the return of the Colt Retro 4x Optic, a four-power carry handle scope designed for older AR-15 and M16 style rifles. The updated optic features improved optics and lens coatings compared to original models, addressing common issues like cloudiness and zero retention. It includes a built-in bullet drop compensator for .223/5.56 ammunition and is exclusively available through Brownells as a partnership with Colt.
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