Very easy. The two primary weapons don't share any components and have a simple under-arm mount. There might be a linky cable or something, but no-one would notice if you left that off, and it might work well with it still there anyway.
All the secondary weapons are simple XV-8 class weapons that can have small magnets embedded over several different locations on the flight pack for positioning.
The model only gets complex if you try to deviate from the standard pose - Still need to print a head for mine...