laststandonzombieisland

Here we see a lovely Pal Kiraly-designed MKPO made in Neuhausen, Switzerland, by Schweizerische Industrie Gesellschaft (SIG).

The mags fold up into a recess in the forearm

Only 1228 of these guns were produced between 1933 and 1941. This one is the MKPO, the short barreled variant, serial number 1162. We can assume it was made in 1941. Caliber is the very hard-hitting 9x25mm Mauser and they were capable of firing at 900 rpms. Photos Sourced from James D. Julia Inc.

Note, magazine folded up

Interestingly enough, one of the largest users of these innovative machine carbines was the Pontifical Swiss Guard who still keep a very well preserved rack of these in their armory to this day.

SIG MKPO subguns on bottom left with their mags folded up into the forearm and MP43 44s top left ready to go in the Swiss Guards armory. Note the two-handed swords to the right

For more on the arsenal of the Swiss Guard, see my article over at Guns.com

Also of note, Pal Kiraly was a Hungarian who later fled to the Dominican Republic and designed the San Cristobal carbine for bad old Trujillo, who thought himself a bit higher up the food chain than the Pope, at least as far the DR was concerned.