gistfile1.lua

local function shoot(pos, dir, damage, speed)
	local obj = minetest.env:add_entity(pos, "com:bullet")
	obj:setvelocity({x=dir.x*speed, y=dir.y*speed, z=dir.z*speed})
	obj:get_luaentity().damage = damage
end

minetest.register_tool("com:ak47", {
	description = "Ak 47",
	inventory_image = "com_ak47.png",
	
	on_use = function(itemstack, user, pointed_thing)
		local pos = user:getpos()
		pos.y = pos.y+1.5
		shoot(pos, user:get_look_dir(), 4, 5)
	end,
	
})

minetest.register_entity("com:bullet", {
	physical = false,
	visual = "sprite",
	textures = {"com_bullet.png"},
	visual_size = {x=0.01, y=0.01},
	collisionbox = {0,0,0,0,0,0},
})