RS Regulate Trijicon ACOG Modular Upper Tactical Mount

RS Regulate introduced the AK-300 Modular Side Mount System in 2012, which has since expanded to include six fully modular uppers and nine different lowers. The lineup covers a front-biased, rear-biased, and full-length lower for most Eastern European AK side rails; a front-biased and full-length lower for Yugo/Serbian rifles; options for PSL and Romanian M10/RH10 rifles; a Century Arms proprietary side rail; and a rear-biased lower for Czech vz. 58s.