Calico Light Weapons Inc. (CLWS) is a privately held firearms manufacturing company based in Hillsboro, Oregon. CLWS produces a line of pistols and pistol-caliber carbines. Calico firearms feature a top-mounted, helical-feed, high-capacity (50 or 100 round) magazine that ejects spent shells from a port in the bottom, making a brass catcher more practical. The Calico 9 mm pistols, carbines and submachine guns use the Roller-delayed blowback principle used in the Heckler & Koch series of firearms.
Although reviews of the product line were very favorable, Calico has yet to secure big military and law enforcement contracts. Sales were severely curtailed by the introduction of the Federal assault weapons ban in 1994 which limited magazine capacity of newly made firearms to ten rounds. Once the legislation was allowed to sunset in 2004, Calico began producing firearms again. Calico weapons are sometimes seen in various movies and science fiction films due to their futuristic appearance.