well since i can't see them, i'm just gonna say right now
-stick battery works all day, and fits
-nunchucks, will fit
-small battery, a bitch to get in but will fit
-large will not fit, unsless you have the big foregrip, or have the full stock, which isn't worth the money i think.
as to Nautic, i wouldn't call a G36 with several hicaps a support weapon, maybe if you had the bipod forgrip, with a legit drum, and the right optics it would be an MG36 (which in turn is a support weapon, one of the Bundeswhers to tell you. (German Military))