Slam fire. Wouldn't think you'd need it on a bolty, but hey! It is useful.
Range. Has a really good range, especially for an unmodded blaster.
Missile sucks. Demolisher missile launcher probably has a good 10 feet on this thing. Also, the little tube sticks up out of the Launcher, causing view obstruction. While yes there is a tactical rail atop the launcher, it's kind of worthless for a pair of reasons: 1. Too high! 2. That pesky tube is in the way.
Good blaster with good atachments if you're willing to pay. As far as moddability goes, I'd reckon it would be the same as or easier than modding a Longshot or Longstrike. I sort of doubt there's any distance modding potential on the Mega launcher and missile launcher because they only travel as far as you can make them.