I grabbed the gun on a lark, it's not even that great. Nice iron sights but the recoil means you're limited to small bursts -- it doesn't climb, but it bounces around like a motherfucker, and it's basically just a (maybe) slight upgrade over a Liberator. For the equivalent of $6.15.
Fortunately, you can still farm super credits for free. Might be boring, but slap a podcast on or just watch a video on a second monitor (if you have one) while you farm and you'll get tons of free SC in short order doing low level missions running around to POIs.