Couple of mag fed multishot options.
Excellent gun
Dedicated stock a good idea
Get a reg fitted. Again lots of options. The AA grub screw moderator is a bit...pants. triggers can be a bit naff but the barrel will generally shoot very very well indeed.
A good purchase and replacing the plastic bits isnt a bad idea either.

A good HFT rifle but 45shots is a bit close to what you need for a comp. Then again. 45 rabbits is a bugger...and its capable of both.