The Shorty is a one-handed sawed-off shotgun that sits in your pistol slot. You find it in the Pittsburgh sewers during The Suburbs, on a bench to the left just after you set off the first sound trap.
Its workbench upgrades include reload speed, clip capacity, recoil and spread.
It only works up close. Pair a blast with a 2x4 or machete swing to drop even armored enemies fast, and switch to a long gun at range.
A durable blunt weapon such as the pipe or a plank keeps an enemy busy without breaking, which buys time for a Shorty blast to finish the job.
Hatchet
The hatchet is a one-handed camp axe that kills any enemy except a bloater in one hit. It is the last bladed weapon you find, first turning up just after you leave Ish's abandoned settlement in the Pittsburgh sewers during The Suburbs.
Machete
The machete kills in one hit and swings faster than the hatchet, but breaks after three uses. The first one is in Ish's settlement in the Pittsburgh sewers during The Suburbs.
Military sniper
The military sniper is a tripod-mounted bolt-action rifle you only use once, in The Suburbs. A hunter uses it to pin Joel, Ellie, Henry and Sam down in the street; once Joel reaches the house and kills him, you man the rifle to cover the others.
2x4
The 2x4 is a plank of lumber and the most common melee weapon in the game, especially in Boston and Pittsburgh. It reaches farther than your fists, stuns a human with one hit and lasts four swings before it breaks.