Hi, its posible to make a grip for allmost assault rifle and the Grenada Launcher M203 for more assault rifle.

And if is posible to make the Ares Shrike, multy task weapons, works in LMG mod and AR mod, have a grenade launcher for both!
Battlefield 4 and Ghost Recon Advanced Warfighter 2 have this weapon.

http://www.imfdb.org/wiki/Ares_Shrike

http://www.imfdb.org/wiki/Battlefield_4#Ares-16_MCR

http://www.imfdb.org/wiki/Ghost_Recon_Advanced_Warfighter_2#Ares_Shrike

this is the info about the weapon and the mods.

http://modernfirearms.net/machine/usa/ares-shrike-e.html

Thks for all.