Looking at how Machinist will have different attachments for the guns:
(guesstimate on what they will do)
- ranged damage + sniper scope
- Conal AOE Shotgun
- stationary turret
Then in the pics it looks like you can have multiple attachments
I can just picture this as the Mudra System where you get a 0.5 GCD to attach your attachment to signal what kind of "blast" you are going to perform.
OMG - NO - DAT LAGGGGG
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This is based on pure speculation, so feel free to flame, bitch whatever. But for the love of God, do not let another system like Mudra into the game ever again.