In order to unlock the BAS-B in Warzone, players must reach Rank 17, which is a fairly low level to reach, so you should have it unlocked in no time, especially if you play MW3 multiplayer modes like Rustment.

Best BAS-B alternatives in Warzone

If you’re looking for some alternatives, give the RAM-7 a try, as this Season 1 gun packs a punch with a bit more power in closer-ranged battles compared to the Battle Rifle.

Also, you could go for the MTZ Interceptor, which has taken over Warzone by storm given its great damage profiles and low recoil.