The multi-purpose rifle Ruger AR-556 MPR with Proof Research carbon fiber barrel

The flat-top lower receiver of the AR-556 MPR is made from aerospace-grade 7075-T6 aluminum forging and includes a forward assist, dust cover and brass deflector.

Ruger originally launched the AR-556 series in-line with the international trend of an increasing demand by civilian shooters for modern sporting rifles – that is, semi-automatic centerfire long guns cosmetically and, partially, technically patterned after modern military-issue weapons – that would offer reliability, rugged construction, and affordable prices.

The 15″ length handguard is free-floated for accuracy with Magpul M-LOK accessory attachment slots at 3:00, 6:00 and 9:00 positions. Additional slots are on the angled faces near the muzzle. Trigger and safety selector lever are bright colored.

The AR-556 MPR with carbon fiber bars uses a rifle-length gas system. Lower receiver is fitted with a Magpul PRS Lite stock with adjustable length of pull and comb height for the best fit, paired with a Magpul MOE-K2 grip. In the MPR rifles the 15″ length handguard is free-floated for accuracy. Magpul M-LOK accessory attachment slots at 3:00, 6:00 and 9:00 positions with additional slots on the angled faces near the muzzle allow for the mounting of any accessory. The muzzle itself is 1/2″-28 threaded for standard accessories and comes standard with a radial port muzzle brake that significantly reduces felt recoil and flip. Bolt is mil-spec 9310 and is machined, shot peened and proof tested for strength and durability. Bolt carrier and gas key have chrome-plated inside diameters to provide enhanced resistance to hot gases.

A two-stage Ruger Elite 452 AR trigger provides a smooth 4.5lb/2.041g trigger pull. Hammer spring is full-strength for consistent primer ignition and a lightweight hammer that enables a faster lock time for improved accuracy.

The Magpul PRS Lite stock’s length of pull and comb height are adjustable. Grip is a Magpul MOE-K2.

Made from aerospace-grade 7075-T6 aluminum forging, the flat top upper receiver includes a forward assist, dust cover and brass deflector. An uninterrupted Weaver/Picatinny rail runs all the way on top of the upper receiver and handguard for easy attachment of magnified optics, red dots or open sights (the rifle comes with no sights).

Compared to the standard Ruger AR-556 MPR that sells for $1089you have to pay a premium for the carbon fiber wrapped barrel version: suggested US retail price for the new Ruger AR-556 MPR with Proof Research carbon fiber barrel is set at $2049.00, with a 30-round Magpul PMAG magazine included.