if there would be special one granade ammo lighter and chepaer than 6 ammo packs for granade launcer. it would be more realistic since those granade launcers attached to raifles are one ammo granade launcers. it would be really nice if we would have that kind of weapon in game. but not as m4 but something else.
also would it be possible to use knife/bayonet on rifle? that plasma knife you can research later to be used on some sort of coil assault rifle of human origin? i know someone said we have enough weapons but coil assault rifle with coul granada launcehr could be very interesting weapon. someting like more accurate than assault rifle we have now, stronger but with lower fire rate.
At the moment the closest we can come to a bayonet is just to have a knife in the holster and to swap it into your off hand to use then replace in the holster (similar to what most people do with the medikit) to continue firing, a one handed, single shot grenade launcher could provide the same functionality with frag,smoke and plasma grenade ammo and of course it could be used as a standalone weapon not as satisfying as an integrated solution but certainly easily doable.
Coil assault gun sounds good maybe with 2 round burst fire mode
Since the fire modes are definined by the ammunition the only realistic way to get radically different fire modes is on energy based weapons as seen in the plasma blaster that has ball and burst modes (or my own plasma thrower in this mod). Of course you can have a grenade mode on a standard rifle mag but using 10 bullets to fire 1 grenade just doesnt feel right.