The crusher seems highly inefficient(singleplayer)

[Vahnkiljoy]

After getting the crusher and using it for a few kills I found that the damage seemed highly inconsistant for devouring 6 rounds per shot, there were times where it one shot I think a hydra and others where I needed at least a second round.

It almost seems like the crusher and flak should be switched in their levels being found. Could just be me but I can't really bring myself to use it with the cost it incurs, what's everyone elses opinions on this weapon?

[GepardenK]

Best weapon in the game :-)

But it doesn't fit well with the "slowly advance into a room" rhythm that many naturally fall into while playing the campaign.

If you fly more aggressively and herd auto-ops by finding sections of a level you can use as circular paths then the crusher is your go-to gun for taking them down one by one. It is also, hands down, the best weapon for doing many quick stealth kills with the invisibility power up - other weapons are time wasters and/or leave you exposed. Furthermore it's upgraded variants are absolutely devastating in intense situations like those pesky 'lock down' rooms.

[Miasmic]

Ballistic ammo is fairly scarce in the SP campaign, but I'd agree with GepardenK, its my favorite weapon in the game overall (that said I didn't use it for my playthrough). Watch the spread ;)

[Vahnkiljoy]

I dunno, I find the flak to be insanely fun, I'm also just talking about the base weapon/first upgrade since they can change almost drastically with the final upgrade.

[worldorder2000]

It's my favorite weapon too when upgraded a very powerful weapon on short distances for longer i think the upgraded impuse is better.

[Stellar Remnant]

I never used the crusher or the flak. Vulcan cannon regular was my most used for stunlock reasons, fusion cannon second (one-shots). And a helluva lot of the homing rocket upgrade.