The Magnum Research MLR22AT is extremely accurate.

The barrel, which still attaches to the receiver using the Ruger’s two-bolt V-block locking system, is feather light, weighing approximately 14 ounces. Barrel composition is steel covered with what the company calls “uni-directional graphite (laid) parallel to the bore axis.” The result, they claim, is a lightweight, incredibly accurate bull-style barrel that’s six times stiffer than the equivalent weight in steel.

This, then, reduces barrel vibration and improves accuracy, while simultaneously the graphite composition dissipates heat rapidly. The barrel does sport silver steel caps at both the muzzle and receiver.

In a final boost to accuracy, the AT features a Benz target chamber –by their explanation, a tighter chamber with a shorter tapered throat leading into the first cut of rifling. A reverse false muzzle, I assume, which guarantees the bullet is chambered true, and in line with the bore, rather than canted even slightly.

Gun review of the Magnum Research MLR22AT. Rounding out the AT is a polypropylene thumbhole stock, with deep checking and semi-swells on the pistol grip, a high optics-friendly comb, and a uniquely-shaped fore-end designed both for weight reduction, as well as to allow the barrel to free-float.

For testing, I mounted an Alpen Apex XP 4-16×44 scope wrapped in Weaver Quad Lock rings atop the AT’s receiver, and scooped up a variety of .22LR ammunition. With the rifle settled into a Lead Sled, and working at a laser-ranged 25 yards, it took us fewer than 30 rounds to get her dialed in. And when I say dialed in, I’m talking everything inside the half-inch square black diamond at the center of a Birchwood Casey Shoot*N*C target. Everything.

After a half dozen such 5- and 10-shot groups, I left my stepson and stack of ammunition at his side, to his own devices. Eventually he wandered over to where I was shooting digitals, with a perma-smile etched on his face. “Would this even be fair on squirrels?” he asked, showing me his targets. One, a 30-round cluster, measured 3/8-inch from center to center. At one point, he began shooting a single hole, and then using that as a target. “This gun is ridiculous,” he said. “We need to buy it.”

And the boy is right; the MLR22AT is ridiculously accurate if you feed her the proper ammunition. Based on the company’s printed suggestion, we sighted the rimfire in with CCI’s Mini-Mag (36-grain/hollow point/1260fps) ammunition.

Problems experienced? Absolutely none; however, I can’t say the same about some of the other ammunition we tried. The company’s printed material did warn of possible function issues when using promotional or bulk ammunition. They weren’t lying.

This article appeared in the December 3, 2012 issue of Gun Digest the Magazine. Click here to learn more and load up on a subscription.

Recommended Rimfire Rifle and Pistol Resources

Gun Digest Book of the .22 RifleThe Gun Digest Book of the .22 Rifle

Customize the Ruger 10/22

The Ruger 22 Automatic Pistol


  1. Sounds like a nice gun. However,I have an old 10/22 that I rebarreled with a bull barrel, and an aftermarket adjustable trigger, a fully bedded stock, and a cheepo Simmons 3-9 scope, and a Harris bipod. I got to tell you, that thing is a real tack driver. I don’t know what the cost is for the MLR22AT, but many many years ago when I built mine, the cost was about $150 for all the additions.