Forget it go and get yourself a 9.6v 1200ma attack pack from here.
http://www.onlybatterypacks.com/show...temID=10259.26
I hope the link worked if not go to the site you will find it I have this in my Sig with a M-100 and bushings and I can run all day long with a R.O.F that's better than stk I shoot about 350 on .2 I love it.you will have to dremel the lock tabs that hold on your rail on the upper cover but all I did was move it to the lower half ,oh your battery tray has to go 2 little screws.....do it you will love it.....Clint