He has Jigoku scout rifle with the Shoot to Loot perk (pick up any ammo by shooting it). Awesome weapon for nightfalls. Bump for your fellow guardians! Available for the next hour.
***Edit 1: Not to use in the nightfall as a weapon you silly guardians, its to use its perk when you are in dire need of ammo and don't want to risk being sent back to orbit.
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Meh if I need ammo I just go invisible and do a loot/ammo run [spoiler]also a revive fallen teammates if need be[/spoiler] But thanks for the tip it could be helpful to some.