FAS all ready has a handful of custom models for you to customize your game. Be sure to check out the Released Assets subforum for more info and to leave feedback.
Kool-Aid and Butterfingers for IFAK by AirborneDaddy
Oh Yeah! :D
BR2FAMAS3 for FAMAS by ville
A fancy FAMAS to replace the standard FAMAS in FAS.
FN SCAR-L MKII for M4A1 by BathroomSecurity
A more modern weapon to replace the long in the tooth M4A1.
CF-05 Animations by Flakk
New and improved CF-05 animations, even the original animator thinks so.