it's pretty wild how arbitrary the shape of a gun is. this almost reminds me of those soviet ROKS-2 flamethrowers that were designed to look like a normal rifle and a normal backpack so they didn't get prioritized as targets
but i don't think this SMG is intentionally deceptive as much as just early in SMG development before they decided on optimal form factors, a lot of early SMGs just look like rifles with magazines sticking out the bottom or side afaik