Nice drawing! It is a really compact Weapon System, nearly resembling an SMG, but it is actually a Carbine, also with either an Integrated Semi-Auto Shotgun or an Integrated Air Bursting Grenade Launcher! Lightweight, highly maneuverable - even with a single hand, since it uses the Bullpup Configuration -, available in three Variants (Carbine, Shotgun+Carbine, ABGL+Carbine), featuring Caseless Ammunition (with weight saving), Effective Range of 300-400m (I presume)... What else? The only drawback, I think, for the M12 C.C. is the Horizontal Magazine which has been placed on the top - but for the M2 C.I.C.W., it is legitimate -, thus preseving the space for an Adjustable Cheek Riser, which would prove very useful... Yeah, it is a old drawing, but can still be a valid sample for other weapons, especially Fictional ones! I really admire your Gallery, Bonez18B, as much as your creativity!