Oh man this was fun to make!

The model should print pretty easy I tried to build in as many printable angles as possible only a few spots need support (under the butt, biting biters arms/chin, hands, left knee) When removing the support material I'd just accept that the magazine is going to break.

I uploaded some pictures of where I printed mine with supports.

I would recommend if you can to print it 10-15% bigger so the arms/hands/legs turn out nicer.