i'd go with ak. i don't really use bullpup often unless im in the mood to pump out 50 shots without reloading. i usually get enough kills and sell my ak after the first wave and im able to get a scar by wave 2, then i usually buy back the ak come wave 3/4. im a big scar fan, and i usually only use my ak when i get down to 2/3 clips left of scar, with a decent amount of specimens left, and save it just incase i need to unload a full clip on a big guy. i usually dont come down to a low amount of ammo with scar though unless my team is bad i need to carry and kill everything at choke.