Um... does the KPOS have a magazine?
Actually, no. The KPOS is a modification you add to a base weapon. I think FAB Defense recommends a Glock model of weapon, but I'm not familiar with their compatibility list. So, technically, the rail system and stock are the KPOS-inspired parts in this image over a base weapon.
Not to come off like an asshole, but alot of you folks need to drop some time into weapons research before you start critiquing weapons. I recommend visiting http://world.guns.ru/main-e.htm for some detailed information on alot of the weapons being posted here or being used as base weapons for inspiration/modification. It's getting kinda irritating having to sift through six posts of "Where's this part" and "How's it supposed to do this" when five minutes of reading could answer those and multitudes of other questions. However, weapons in the
Impracticality and
Ridiculous Concept sections can be exempt to the necessity of research, since the designs are, by nature, concept designs.