The 27-inch short and compact bull-pup MSAR Modular Carbine System, the MSC-08 can be changed from one caliber into another quickly, by changing the bolt head, barrel, and if necessary, the magazine well adaptor sleeve. Its high strength alloy receiver is standard, supplied with either a 9-inch Picatinny rail, or with an integrated detachable 1.5x optic. The 16.5 inch long, quick detachable, chrome lined barrel, along with its choice of popular pistol calibers, makes it suitable for accurate and casual target shooting, hunting, or personal defense, well beyond the ranges of a pistol, in the same caliber. The receiver accepts a side-mounted Picatinny rail that allows the mounting of illumination or other sighting devices.