>>64140350
>The mags are unreliable
Are they? Or are you taking some bad experiences with calicos as indicative of all helical mags?
>9x18mm sucks
Its a submachine gun, they're all ballistically dogshit. 9x18 is just rebranded .380, which is perfectly fine for killing shit. Also 9x18 is like 20% shorter than 9x19, so for a helical gun its probably ideal, since shorter rounds means more rounds in the mag without increasing OAL.