Calico M900

The Calico M900 is a semi-automatic carbine chambered in .22 Long Rifle, produced by Calico Light Weapon Systems as a rimfire companion to the M100. It uses the same distinctive helical-feed magazine mounted above the receiver, available in 50 or 100-round capacity. The M900 features a blowback action and a full-length Picatinny rail on top of the receiver. Its lightweight construction and massive magazine capacity made it popular for plinking and competition. The M900 was one of the few rifles capable of firing 100 rounds of .22 LR without reloading. It was also produced in a select-fire variant.