Those are uh, just Halo 1's normal animations in the retail game, albeit a slowed-down reload and no rapid fire overlay so the firing looks a bit better. (Excuse me if you used sarcasm btw)
The flashlight animations are actually still in the fp's, and the stealth melee. Choking Victim has a thread somewhere with some FP animation work he's done with Open Sauce like enabling the flashlight feature and randomized melees as well.
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