Needler is in the other thread / poll. (Poll #1) (see op)
What is needle rifle
https://www.halopedia.org/Type-31_needle_rifle It was introduced in Halo: Reach. If you played it, this was the gun that killed Kat. It was fun to use in the campaign. I don't remember it being as effective in multiplayer.
It's been so long since I played it