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RS REG Modular AR Upper, Trijicon RMR Ready – Precision

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RS REG TRIJICON RMR MODULAR UPPER

In 2012, RS Regulate began rolling out the first models of the AK-300 Modular Side Mount System, which now features six fully modular uppers and nine different lowers: a front-biased, a rear-biased, and a full-length lower for most Eastern European AK side rails; a front-biased and full-length lower for Yugo/Serbian rifles; a PSL and and Romanian M10/RH10 rifles; a Century Arms proprietary side rail; and even a rear-biased lower for Czech vz. 58s.

$76.00

4 in stock

Purchase & earn 76 points!

RS REG Trijicon RMR Modular Upper – Precision Meets Purpose 🔧💥

Level up your AR pistol or SBR build with the RS REG Trijicon RMR Modular Upper — a rugged, ready-to-run solution built for serious shooters who demand reliability, modularity, and peak performance.

This upper comes fully equipped and optics-ready — no guesswork, no compromise. Engineered from durable, hard-anodized 7075-T6 aluminum, it delivers strength without the bulk. The integrated Trijicon RMR mounting plate ensures a rock-solid fit for your red dot of choice — zero holds strong, round after round.

Key Features:

🔹 Monolithic upper with built-in RMR cut — no adapters needed
🔹 Machined to tight tolerances for better fit, better accuracy
🔹 M-LOK® compatible modular handguard — customize your setup
🔹 Compatible with most lower receivers and BCGs
🔹 Sleek, low-profile design — great for CQB and compact builds

Whether you’re upgrading your bedside blaster or dialing in a truck gun for weekend range time with the boys, this upper gets it done. The modular handguard gives you the freedom to mount lights, lasers, or grips just the way you like it — because performance should fit your mission, not the other way around.

Spend less time building, more time sending rounds downrange. 🧰➡️🎯

Built for dads who run drills on Saturday and mow lawns on Sunday.

Grab your RS REG Trijicon RMR Modular Upper now — and give your build the tactical edge it deserves. 👊🇺🇸