Ics ak compatibility

[BIGwat]

hi all i have a ics aks74u (mars 34) ive been purchasing quite a few external parts for it and them not fitting properly or at all! Such as rails and hanguards, I was wondering if there are any ics people out there who could shed some light on this as to what other brands are compatible with ics as lets face it ics dont really have too much to offer in terms of aftermarket external customization options. it would be very much appreciated guys/girls.

thanks
BIG.