Ammo is not craftable, and must be bought in the Marine Supply Shop located in the General Store.

The Marine Shop is represented by this icon:

Ammunition Types: Pistol Clips Shotgun Shells Pulse Rifle Clips Smart Gun Ammunition Flame Thrower Fuel Grenade Launcher Shells Chaingun Ammo Case

Use ammunition? Yes No Pistol Brass knuckles Shotgun Baseball Bat Pulse Rifle Knife Flame Thrower Chainsaw Smart Gun Rail Gun Grenade Launcher Time Bomb Chaingun Air Strike