The PPSh-41 is a Military Spec submachine gun sold at Wizard Island from Trust level 1. It is easy to control at close range and fires at the maximum rate. Each bullet hits soft, so it shines on packs rather than big targets.
It sprays down Swarmers and humans at short range. Low damage and stopping power make it a poor fit for Breakers or Reachers.
The Chicago Chopper from the same camp hits harder with a 55-round drum, but costs more and needs Trust level 2. Buy the PPSh-41 if you reach Wizard Island short on credits.
.50 BFG
The .50 BFG is a Special Forces sniper rifle sold at Wizard Island from Trust level 2. It hits harder than almost anything in the game and holds 10 rounds. Bring it for Reachers, Ragers and anything you want dead in one shot.
Chicago Chopper
The Chicago Chopper is a drum-fed Military Spec submachine gun sold at Wizard Island from Trust level 2. It has the highest fire rate and a 55-round drum. It is a primary-slot answer to Freaker crowds at close range.
Eliminator
The Eliminator is a Military Spec heavy pistol that can drop a Freaker in one shot. Jacob D'Angelo sells it at Wizard Island from Trust level 2. Expect heavy recoil and 9 rounds a magazine.
Frag Grenade
The Frag Grenade is a military fragmentation grenade you cannot craft. Hot Springs, Lost Lake and Wizard Island sell them from Trust level 3. Use them on human groups behind cover and on tight Freaker packs.