MPC Weapons

 

60mm rifles, M1 on top, and two Springfield bolt action rifles.

Three carbines.  Top three are all different in detail, note the top magazine is very thick, the third from the top has a checkered magazine.  The bottom magazine is the curved 30 round magazine which was post war with the M2 selector switch full automatic fire / semi-automatic fire weapon.

Bottom of helmets.  Note how the thickness of the helmet rims varies.

Same helmets in the same order from the top.

Three different submachine guns.  

I think the upper left is an M50 Madsen submachine gun.  It was used by the US Army Green Berets in Vietnam.

 https://modernfirearms.net/en/submachine-guns/denmark-submachine-guns/madsen-m46-m50-m53-eng/

The one below that, left bottom, is an M3 Grease gun, but it's much thicker that is should be.

 https://modernfirearms.net/en/submachine-guns/u-s-a-submachine-guns/m3-m3a1-eng/

The lower right gun is the Smith and Wesson M76, https://modernfirearms.net/en/submachine-guns/u-s-a-submachine-guns/smithwesson-m76-eng/

I have no idea what the upper right weapon is supposed to be?