![]() Also I wanted to keep the rifle as light as possible.Īn RDS with a 2 MOA dot is capable of putting rounds into four inches at 200 yards. 450 Bushmaster is flat shooting out to about 100 yards and is at its best when used within 200 yards, with the bullet impacting only about three and a half inches low at that distance. Some may question why a red dot sight (RDS) instead of a traditional scope. Aimpoint Micro T-2 with 2 MOA dot was utilized to evaluate the rifle.Īs no sights are included with the rifle, I mounted an Aimpoint Micro T-2 with 2 MOA dot. ![]() A single five-round magazine ships with the rifle. The feed lips, of course, are different than those on a 5.56mm magazine. 45-caliber bullets are stacked, not staggered, to feed directly into the chamber. The magazine is the same dimensions as a 20-round AR-15 magazine, but standard mags cannot be used in the Ruger rifle for a couple of reasons. The receiver is not marked with a caliber, but “450 BUSHMASTER” is laser engraved on the inside and outside of the dustcover. Overall length is 35.60 to 38.90 inches depending on the placement of the stock. Around the circumference of the handguard are a total of 40 M-LOK slots for mounting accessories.Ī six-position Magpul MOE stock and an MOE pistol grip are used on the rifle. The top of the handguard has a full-length Picatinny rail. Free-float handguard’s Picatinny rail and M-LOK attachment points.Ī free-float handguard extends 16 inches from the receiver. The muzzle has an 11/16”x24 thread pattern. The Ruger rifle has an 18.63-inch barrel with a 1:16 right-hand twist and comes with a muzzle brake installed. ![]() RUGER AR-556 MPR THUMPER Included muzzle brake has 11/16”x24 thread pattern. 450 Bushmaster has taken every large game animal in North America, including moose, elk, and bison. One reason the cartridge has recently gained popularity is that some states allow only cartridges with a straight-walled case. Brandon Trevino took a feral boar on the same hunt with the Ruger 556 MPR in. Last summer I tagged out on a Corsican Ram using my Ruger American Ranch chambered in. I have been a big fan of the cartridge ever since. On a trip to Texas, I took a fair-sized Russian boar with it with a single well-placed shot. Years ago I was lucky enough to receive one of the very first Bushmaster rifles released and put it to effective use within a couple of weeks. Brandon Trevino with feral boar taken with Ruger AR-556 MPR in. Cooper described the “Thumper” as a semi-auto rifle firing the. In his book To Ride, Shoot Straight, and Speak the Truth, Cooper wrote about wanting to design a rifle for soldiers who were not primarily shooters, such as tank crews, shooting a round that would be decisive when used for defense. ![]() In fact, this is the platform the cartridge was originally designed for.īushmaster designed a rifle that would work with the round and Hornady came up with the cartridge itself and nicknamed it the “Thumper”-a hat tip to Jeff Cooper, who first envisioned the concept. The company’s Ruger American Ranch chambered for that cartridge has been one of Ruger’s best-selling rifles, so it only made sense to bring one out in the popular AR platform. Last year Ruger added a model to their AR-556® MPR line chambered for the.
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