Yea, if I sucked at PvP I'd probably use one of the worst guns as well. That way I could use it as an excuse and feel better about my lack of skill. I used the strangers rifle for the first couple months of Destiny when PR's were terrible and still managed a 3.0+ KD. When I made a new PSN out of boredom I managed to hold a 6.0+ KD using a lvl 4 vanilla PR and the original sniper. I wasn't even able to use heavy yet.