The Rock River Arms LAR-15M Operator DMR is a 16-inch 5.56 NATO semi-auto rifle set up for precision work at carbine length (Rock River Arms part no. OP1510). It pairs a forged A4 upper and a forged RRA LAR-15M lower with a chrome-lined barrel, an RRA Two Stage Ultra Match trigger and a 13-inch lightweight free-float M-LOK handguard. A BCM SOPMOD stock and a Hogue beavertail grip handle the shoulder and hand, and Magpul Pro-Series MBUS flip-up sights are included. The maker rates the rifle at 1 MOA at 100 yards. It is a good fit for a shooter building a designated-marksman style rifle without starting from a bare upper.

Key Specifications

• The chambering is 5.56mm NATO, and the chamber handles both 5.56mm and .223 Remington ammunition.
• The barrel is 16 inches, chrome lined with a 1:9 twist, for bore life and a range of bullet weights.
• The muzzle device is an A2 flash hider on 1/2-28 threads, so common muzzle devices can be swapped in.
• The trigger is the RRA Two Stage Ultra Match, chosen for a crisp, consistent break at distance.
• The handguard is a 13-inch lightweight free-float rail that accepts M-LOK accessories.
• The buttstock is a BCM SOPMOD unit, and the pistol grip is a Hogue beavertail grip.
• The sights are Magpul Pro-Series MBUS flip-up front and rear, a backup to a magnified or red-dot optic.
• The receivers are a forged A4 upper and a forged RRA LAR-15M lower, standard AR-15 construction.
• The rifle weighs 6.5 pounds and measures 33 inches with the stock retracted, so it stays handy for its class.
• RRA lists the accuracy at 1 MOA at 100 yards and includes a magazine, case, 5-slot Picatinny rail and QD sling mount.

Frequently Asked Questions

Does the Operator DMR come with sights? Yes. It includes Magpul Pro-Series MBUS flip-up front and rear sights, and the 13-inch rail takes an optic.

How is this 16-inch model different from the 20-inch Operator DMR? The Operator DMR is offered in a 20-inch version (OP1505) and this 16-inch version; this one uses the shorter chrome-lined barrel for a handier rifle.

What comes in the box? Rock River lists one magazine, a case, a 5-slot Picatinny rail, a QD sling mount, a manual and warranty information.

Buy the Rock River Arms LAR-15M Operator DMR 5.56 NATO Rifle

If you want an AR with the trigger, rail and stock already chosen well, this Operator DMR saves the parts shopping. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL, and browse more AR rifles while you are here.