Thats what lucky raspberry is for. The grenade refresh works will all grenades.

Except that, that's stupid. Gunslinger has better exotic choices than an armor piece that doesn't quite [i]not[/i] cater to it. SoYA already buffs tripmines. They're arms meant for gunslinger. I can't see any reasonable argument they shouldn't be the GS's equivalent of the lucky raspberry. Edit: I suppose I'm being unnecessarily reserved on the subject. GS has been my class since before release and tripmines have been my choice of grenade also. I've got a lot of experience with them as a strong foundation of my opinion here. I'd already considered the perk possibilities of this item when I originally got it long before TDB and I've been assessing the grenade and the arms with every weapon tuning fix to the game. There's no new information, perception or strategic insight that's going to change my mind on the idea that two tripmines < extended duration and energy refresh on spawn.