How many rounds does it take to supercombine? Because if it is seven, it technically should count as a Perfect Kill.
It really depends. You have to try out the weapon first.
I think that considering the odds before all is not bad plan :v
It seems similar to the Needle Rifle from Reach, which supercombined in 5 shots. In any case, if I get my hands on a couple, I am advancing my Carbine commendation.