Second on the list of needed improvements was a better trigger pull. However, as it came from the factory, that MPX carbine was far from perfect for competition.įirst, it was too heavy, but the new the PCC sports a lightened handguard that brings the center of gravity back and the weight down to six pounds, 14.5 ounces. That low recoil was due both to the SIG’s heavy-for-class weight and short-stroke piston operating system. They liked its large integral magazine well, but it was chosen among gamers mostly for its low recoil. Over the past few years, an older version of the MPX was a preferred pistol-caliber carbine among serious competitors. There is no buffer tube, so the MPX can be fired with the stock folded if you want extra credit for style points. There is a detent so it stays in the folded position. The stock is five-position adjustable for length, and it folds to the left side as well. × The controls are ambidextrous, and the crisp Timney trigger is a big improvement over the trigger found in the older MPX competition shooters used to flock to.Īll the AR-style controls on the lower receiver, as well as the charging handle, are ambidextrous. This operating system reduces reciprocating weight, reducing recoil. Instead of having a direct-gas-impingement operating system like most rifle-caliber ARs or being a straight blowback gun like most pistol-caliber ARs, the MPX uses a proprietary short-stroke gas piston system. While it will accept a few AR parts, the MPX is a completely unique design from the inside out.
It free-floats inside a 15-inch aluminum handguard with M-Lok accessory slots at three, six and nine o’clock.įrom its appearance many people might describe the MPX as a “pistol-caliber AR,” but that description is not as accurate as you might think.
The MPX PCC has a 16-inch barrel that is tipped with a three-port muzzle brake. The largest is the new MPX PCC, a 9mm carbine intended for PCC (pistol caliber carbine) competition, and right now it’s hard to find a hotter segment of the shooting market than PCCs. The smallest is the 3.5-inch-barreled Copperhead pistol. SIG’s MPX was originally designed as a submachine gun, but SIG has seen more success selling pistol and carbine versions of this interesting design.
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