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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I have several weapons with that perk and never realized you had to shoot the ammo to pick it up. Feel like an idiot, entire time I thought that perk was glitched and not working.