M100

The M100, also known as the Calico M100 or the M100 Calico, is a non-canon, semi-automatic/automatic assault rifle featured in some fanon maps.

Blackstar27
The M100 is featured in the Remember When... storyline maps as a automatic weapon and is availiable only from the Mystery Box. When pack-a-punched, it becomes the Spr4y3r and it gains a holographic sight.