Not going to go over which perks are better or not just like damage numbers. Tested on level 4 patrol on the cosmodrome. Results: it sucks The "damage" for the burst fire and single shot only yielded 1-3 more damage on an enemy this making the burst or single shot kinda worthless due to the fact is really doesn't decrease the damage drop off at all. Even with max range config it gets a hardey damage drop off will I was still get same damage with a random scout I had. So use it only in the auto config. How good is the 900? With both stability perks it offered about~ the same stability as Fabian strategy with the stability barrel. So wouldn't recommend that. Conclusion:use it as a fancy high impact auto with some customization.