[dpvu]

You could buy a tri-mount or something like that to attach your accessories while keeping the front-end you have. That would allow you to still store a mini battery in the foregrip. Alternatively, you could buy a RIS and a battery PEQ box of some kind. The advantage of these is you can keep your gun wired to the front while allowing you to mount accessories as you see fit.

Re-wiring isn't hard if you know what you're doing but it's time consuming and requires opening and taking almost everything out of the mechbox.