Went a head and bought it anyway.
I bought one thirty rounder...and let me say...it fits in snuggly in that one part.....and that means you got 60 rounds in just the gun itself...and then you can carry more around with you.
Mine is the Kel-Tet SU16CA Version and it has metal sights....and my god...this thing is so comfortable...I LOVE IT! Came with a reflex scope too!....and it only cost me 660 bucks after I got a new mag and some ammo.
I LOVE THIS GUN!
Damn It's even got a magazine catch! HOOO HOO IT's so light...and just flickable.