Be creative here there are no wrong ideas.
I would like the Spartan laser to be a weapon personally, just called something different "Charge Rifle" was a name I had in mind
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I also want to be able to get all the enemies weapons like the cabal grenade launchers, vex Minotaur energy rifles, boomers, and enemie weapons in general. Also some sort of energy secondary weapons that shoot balls of energy that explode on impact. It would hold half the reserve ammo of a shotgun but do twice the damage with twice the distance just slower velocity.