Gun Digest

MPR 308/5.56 Offers Multiple Calibers On One Platform

Searching for one gun that can do it all? Olympic Arms might have just whipped it up with its new convertible MPR 308/5.56.
Searching for one gun that can do it all? Olympic Arms might have just whipped it up with its new convertible MPR 308/5.56.

The Olympic Arms MPR 308/5.56 seamlessly jumps between AR-10 and AR-15, giving shooters a ton of caliber choices. Leap from tactical carbine to heavy deer gun in an instant.

It’s safe to say Olympic Arms has a knack for innovation.

The Washington-based gun maker cooked up some of the first pistol-caliber ARs. It introduced the flat-top upper receiver. And it has generally pulled the black-rifle market into the future. And the company isn’t done yet.

Olympic Arms is endeavoring into the realm of AR-10 rifles, but in typical fashion is offering much more than just a larger-caliber semi-automatic. In fact, the company’s new MPR 308/5.56 Rifle gives shooters a veritable cornucopia of calibers on one platform.

Olympic Arms has designed the rifle system to switch between its AR-10 upper receiver to any Mil-Spec AR-15 upper — regardless of caliber. Perhaps best of all, the system does not require any retrofitting to accomplish its conversion; out of the box it is ready to rock and roll in nearly any configuration a shooter can cook up.

The company has achieved this flexibility through some elegant engineering. This is particularly evident on the MPR 308/5.56's lower receiver.

The quick conversions are facilitated by two pivot pin locations milled on the lower. The longer local affixes Oly’s AR-10 upper, the shorter one pops on any Mil-Spec AR-15. The lower also has a slick mag well, milled to accept both AR-10 and -15 magazines. Of course, when it comes to the larger-caliber the magazines are proprietary; the smaller caliber, once again if it’s Mil-Spec it will work.

Finally, the company has redesigned the buffer system so it does not need to be switched for conversions. The bolt carrier in Olympic Arms’ AR-10 makes contact on the rim of the buffer, while the AR-15 makes contact on the center of it.

Olympic Arms MPR 308/5.56 mag well is designed to accept both the company’s proprietary AR-10 magazine and all Mil-Spec AR-15.

The convertibility of the MPR 308/5.56 gives it access to all of the standard AR-15 chamberings — 5.56 NATO, .300 Blackout, 6.5 Grendel, etc. But shooters will get to enjoy more than just .308 Winchester when shooting the rifle in an AR-10 configuration. Olympic Arms has a slew of calibers slated for the rifle in the future, including .243 Winchester, .260 Remington, 7mm-08, .300 WSM and .270 WSM.

The MPR 308/5.56 comes configured as a .308 AR-10 and is available with 16-, 18- and 24-inch stainless steal bull barrels. The MSRP for the rifle runs from $1,267 to $1,688 depending on barrel length.

NEXT STEP: Download Your Free Storm Tactical Printable Target Pack

62 Printable MOA Targets with DOT Drills - Rifle Range in YARDS
This impressive target pack from our friends at Storm Tactical contains 62 printable targets for rifle and handgun range use. Target grids and bullseye sizes are in MOA. Ideal for long-range shooting! Get Free Targets

Exit mobile version