If you're working on a US Army impression using an M4A1, the Specna Arms CORE™ Battle Red Dot Sight w/20mm Picatinny Mount is the right way to top it off! A close replica of the real steel US Army-issued M68 CCO, a tube-style red dot reflex sight renowned in the real steel world for its robust nature, the CORE™ Battle Red Dot Sight is a fantastic option for new and veteran skirmishers alike

Despite entering service in 2000 as one of the first mass-issued red dot sights in the world, this type of red dot sight is still in production to this day. Known as the "AP PRO", the continued production of the M2 shape is a testament to its timeless design and popularity in the real steel world. 

CCO stands for Close Combat Optic, though in Airsoft terms, the CORE™ Battle Red Dot Sight is suitable for any skirmishing scenario, benefitting from ultra-fast target acquisition in CQB and a wide field of view for maximum situational awareness in a woodland/outdoor setting. Packaged with a cantilever mount for 20mm Picatinny rails and flip-up lens caps to complete the iconic M68 CCO look, if you're running an as-issued M4A1, this is the perfect optic for your build!