diff --git a/shooter/api.lua b/shooter/api.lua
index 6ef2278..d82bb5b 100644
--- a/shooter/api.lua
+++ b/shooter/api.lua
@@ -184,6 +184,13 @@ function shooter:register_weapon(name, def)
 	local shots = def.shots or 1
 	local wear = math.ceil(65534 / def.rounds)
 	local max_wear = (def.rounds - 1) * wear
+	-- Fix sounds table
+	def.sounds = def.sounds or {}
+	-- Default sounds
+	def.sounds.reload = def.sounds.reload or "shooter_reload"
+	def.sounds.fail_shot = def.sounds.fail_shot or "shooter_click"
+	-- Assert reload item
+	def.reload_item = def.reload_item or "shooter:ammo"
 	minetest.register_tool(name, {
 		description = def.description,
 		inventory_image = def.inventory_image,
@@ -204,19 +211,53 @@ function shooter:register_weapon(name, def)
 			else
 				local inv = user:get_inventory()
 				if inv then
-					local stack = "shooter:ammo 1"
+					local stack = def.reload_item .. " 1"
 					if inv:contains_item("main", stack) then
-						minetest.sound_play("shooter_reload", {object=user})
+						minetest.sound_play((def.sounds.reload), {object=user})
 						inv:remove_item("main", stack)
-						itemstack:replace(name.." 1 1")
+						if def.unloaded_item then
+							itemstack:replace(def.unloaded_item.name.." 1 1")
+						else
+							itemstack:replace(name.." 1 1")
+						end
 					else
-						minetest.sound_play("shooter_click", {object=user})
+						minetest.sound_play((def.sounds.fail_shot), {object=user})
 					end
 				end
 			end
+			-- Replace to unloaded item
+			if def.unloaded_item and (itemstack:get_wear() + wear) > 65534 then
+				itemstack:set_name(def.unloaded_item.name)
+			end
 			return itemstack
 		end,
 	})
+	-- Register unloaded item tool
+	if def.unloaded_item then
+		local groups = {}
+		if def.unloaded_item.not_in_creative_inventory == true then
+			groups = {not_in_creative_inventory=1}
+		end
+		minetest.register_tool(def.unloaded_item.name, {
+			description = def.unloaded_item.description,
+			inventory_image = def.unloaded_item.inventory_image,
+			groups = groups,
+			on_use = function(itemstack, user, pointed_thing)
+				local inv = user:get_inventory()
+				if inv then
+					local stack = def.reload_item .. " 1"
+					if inv:contains_item("main", stack) then
+						minetest.sound_play((def.sounds.reload), {object=user})
+						inv:remove_item("main", stack)
+						itemstack:replace(name.." 1 1")
+					else
+						minetest.sound_play((def.sounds.fail_shot), {object=user})
+					end
+				end
+				return itemstack
+			end,
+		})
+	end
 end
 
 function shooter:fire_weapon(user, pointed_thing, def)
diff --git a/shooter/doc/api.md b/shooter/doc/api.md
new file mode 100644
index 0000000..79e6fff
--- /dev/null
+++ b/shooter/doc/api.md
@@ -0,0 +1,90 @@
+Shooter API Reference Alpha (DEV)
+=================================
+
+IMPORTANT: This WIP & unfinished file contains the definitions of current advanced_npc functions
+(Some documentation is lacking, so please bear in mind that this WIP file is just to enhance it)
+
+
+Summary
+-------
+* Introduction
+* Register a Weapon
+* Definition tables
+
+
+Introduction
+------------
+An experimental first person shooter mod that uses simple vector mathematics
+to produce an accurate and server-firendly method of hit detection.
+
+By default this mod is configured to work only against other players in
+multiplayer mode and against Simple Mobs [mobs] in singleplayer mode.
+
+Default configuration can be customised by adding a shooter.conf file to
+the mod's main directory, see shooter.conf.example for more details.
+
+This is still very much a work in progress which I eventually plan to use
+as the base for a 'Spades' style FPS game using the minetest engine.
+
+Register a Weapon
+-----------------
+The API works with tools and items that represent a weapon, 
+then you should register the weapon and another support items (like ammo).
+
+### Methods
+* `shooter:register_weapon(weapon_name, {Weapon Definitions})`: Register a weapon item
+  `weapon_name` is the itemstring for a tool to be registered
+
+Global Tables
+-------------
+* `shooter.registered_weapons`: Registered weapons by itemstring
+
+Definition tables
+-----------------
+
+### Weapon Definitions (`shooter:register_weapon`)
+
+    {
+        description = "Rifle", -- Weapon description name
+        
+        inventory_image = "guns_rifle.png", -- Inventory imagem for the weapon item
+        
+        rounds = 100, --[[ Amount of shots 
+            ^ Refilled only by the defined reload item ]]
+        
+        reload_item = "itemstring", --[[ Reload Item
+            ^ If omitted, "shooter:ammo" is used ]]
+        
+        unloaded_item = { -- OPTIONAL | Item to be registered for unloaded weapon item
+        	name = "itemstring", -- Itemstring to be registered
+        	description = "Rifle (Unloaded)", -- Weapon description name
+        	inventory_image = "guns_rifle_unloaded.png", -- Inventory imagem for the unloaded weapon item
+        	not_in_creative_inventory = true, -- OPTIONAL | If true, does not display unloaded item in creative inventory
+        },
+        
+        spec = { -- Weapon Aspects
+        
+            range = 200, -- Range (in blocks) of shot
+            
+            tool_caps = { -- Tool capabilities for registered item tool
+            	full_punch_interval = 1.0,
+            	damage_groups={fleshy=3}
+            },
+            
+            groups = { -- Projectile destruction force 
+            	snappy=3, 
+            	crumbly=3, 
+            	choppy=3, 
+            	fleshy=2, 
+            	oddly_breakable_by_hand=2
+            },
+            
+            sounds = { -- Sound files
+            	shot = "guns_rifle", -- When weapon shoots (if omitted, "guns_rifle" is used)
+            	reload = "shooter_reload", -- When reload weapon (if omitted, "shooter_reload" is used)
+            	fail_shot = "shooter_click", -- When the weapon fail by unloaded (if omitted, "shooter_click" is used)
+            },
+            
+            particle = "shooter_bullet.png", -- Particle texture file name for projectile
+        },
+    }