I was wondering in teams slayerdo you get to choose your load out like halo 4 or what??
No load outs in ranked.
There is no loadouts. You start with whatever the particular game type is. It depends.
Depending on the game type variation of the slayer game, players will each start with the same weapon, ranging from the assault rifle, battle rifle, etc. The only game mode with custom weapon spawns in warzone (to an extent).