This .177 caliber Colt M45 CQBP Air Gun, with blowback, is a variation of the 1911 Rail Gun that’s enlisted by the U.S. Marine Corps. The M45 Close Quarter Battle Pistol by Umarex has a drop-free airgun magazine with a capacity of 19 rounds. Steel BBs travel out of the smooth, metal barrel at a speed of 400 feet per second. The left grip plate removes for the loading of a 12 gram CO2 capsule and the mainspring slides out of the bottom of the grip frame to reveal a hex key for piercing the CO2 cartridge. Like the M45 issued to Marines, as well as, the commercial version, the Umarex model features the flat, desert tan color on a metal slide. The frame is a polycarbonate substrate with black poly grips. The air gun also has an under-barrel Picatinny rail; three-dot sights, of which the rear is adjustable for windage; a flat, serrated mainspring with a lanyard loop; an enhanced Commander-style hammer; a long, solid trigger; and an ambidextrous safety lock. For those familiar with the Colt M1911A1, physical handling of the M45 airgun is very similar. The airgun is manufactured to dimensional specs so that it fits duty holsters. The trigger pull comes in at 4.25 pounds and the overall weight of this airgun is 1.75 pounds.