diff --git a/data/mods/default/init.lua b/data/mods/default/init.lua
index bcd633b34..5ffed25ff 100644
--- a/data/mods/default/init.lua
+++ b/data/mods/default/init.lua
@@ -225,6 +225,7 @@
 -- -           select_horiz_by_yawpitch=false)
 -- - ^ Select sprite from spritesheet with optional animation and DM-style
 -- -   texture selection based on yaw relative to camera
+-- - set_armor_groups({group1=rating, group2=rating, ...})
 -- - get_entity_name() (DEPRECATED: Will be removed in a future version)
 -- - get_luaentity()
 -- Player-only: (no-op for other objects)
diff --git a/data/mods/experimental/init.lua b/data/mods/experimental/init.lua
index ddc89f92c..c37488d04 100644
--- a/data/mods/experimental/init.lua
+++ b/data/mods/experimental/init.lua
@@ -330,6 +330,7 @@ function TNT:on_activate(staticdata)
 	self.object:setvelocity({x=0, y=4, z=0})
 	self.object:setacceleration({x=0, y=-10, z=0})
 	self.object:settexturemod("^[brighten")
+	self.object:set_armor_groups({foo=1,bar=2})
 end
 
 -- Called periodically
@@ -355,7 +356,7 @@ function TNT:on_punch(hitter)
 	if self.health <= 0 then
 		self.object:remove()
 		hitter:get_inventory():add_item("main", "experimental:tnt")
-		hitter:set_hp(hitter:get_hp() - 1)
+		--hitter:set_hp(hitter:get_hp() - 1)
 	end
 end
 
diff --git a/src/content_cao.cpp b/src/content_cao.cpp
index 836f719a3..33079fd11 100644
--- a/src/content_cao.cpp
+++ b/src/content_cao.cpp
@@ -240,6 +240,7 @@ private:
 	int m_anim_num_frames;
 	float m_anim_framelength;
 	float m_anim_timer;
+	ItemGroupList m_armor_groups;
 
 public:
 	LuaEntityCAO(IGameDef *gamedef, ClientEnvironment *env):
@@ -594,14 +595,21 @@ public:
 			m_hp = result_hp;
 			// TODO: Execute defined fast response
 		}
+		else if(cmd == LUAENTITY_CMD_UPDATE_ARMOR_GROUPS)
+		{
+			m_armor_groups.clear();
+			int armor_groups_size = readU16(is);
+			for(int i=0; i<armor_groups_size; i++){
+				std::string name = deSerializeString(is);
+				int rating = readS16(is);
+				m_armor_groups[name] = rating;
+			}
+		}
 	}
 	
 	bool directReportPunch(v3f dir, const ItemStack *punchitem=NULL,
 			float time_from_last_punch=1000000)
 	{
-		// TODO: Transfer this from the server
-		ItemGroupList m_armor_groups;
-		
 		assert(punchitem);
 		const ToolCapabilities *toolcap =
 				&punchitem->getToolCapabilities(m_gamedef->idef());
@@ -613,7 +621,6 @@ public:
 		
 		if(result.did_punch)
 		{
-			// TODO: Decrease hp by 
 			if(result.damage < m_hp)
 				m_hp -= result.damage;
 			else
@@ -623,6 +630,19 @@ public:
 		
 		return false;
 	}
+	
+	std::string debugInfoText()
+	{
+		std::ostringstream os(std::ios::binary);
+		os<<"LuaEntityCAO \n";
+		os<<"armor={";
+		for(ItemGroupList::const_iterator i = m_armor_groups.begin();
+				i != m_armor_groups.end(); i++){
+			os<<i->first<<"="<<i->second<<", ";
+		}
+		os<<"}";
+		return os.str();
+	}
 };
 
 // Prototype
diff --git a/src/content_sao.cpp b/src/content_sao.cpp
index 0c105bb0f..02a4eb1eb 100644
--- a/src/content_sao.cpp
+++ b/src/content_sao.cpp
@@ -354,7 +354,8 @@ LuaEntitySAO::LuaEntitySAO(ServerEnvironment *env, v3f pos,
 	m_last_sent_position(0,0,0),
 	m_last_sent_velocity(0,0,0),
 	m_last_sent_position_timer(0),
-	m_last_sent_move_precision(0)
+	m_last_sent_move_precision(0),
+	m_armor_groups_sent(false)
 {
 	// Only register type if no environment supplied
 	if(env == NULL){
@@ -475,6 +476,21 @@ void LuaEntitySAO::step(float dtime, bool send_recommended)
 			fabs(m_yaw - m_last_sent_yaw) > 1.0){
 		sendPosition(true, false);
 	}
+
+	if(m_armor_groups_sent == false){
+		m_armor_groups_sent = true;
+		std::ostringstream os(std::ios::binary);
+		writeU8(os, LUAENTITY_CMD_UPDATE_ARMOR_GROUPS);
+		writeU16(os, m_armor_groups.size());
+		for(ItemGroupList::const_iterator i = m_armor_groups.begin();
+				i != m_armor_groups.end(); i++){
+			os<<serializeString(i->first);
+			writeS16(os, i->second);
+		}
+		// create message and add to list
+		ActiveObjectMessage aom(getId(), true, os.str());
+		m_messages_out.push_back(aom);
+	}
 }
 
 std::string LuaEntitySAO::getClientInitializationData()
@@ -685,6 +701,12 @@ std::string LuaEntitySAO::getName()
 	return m_init_name;
 }
 
+void LuaEntitySAO::setArmorGroups(const ItemGroupList &armor_groups)
+{
+	m_armor_groups = armor_groups;
+	m_armor_groups_sent = false;
+}
+
 void LuaEntitySAO::sendPosition(bool do_interpolate, bool is_movement_end)
 {
 	m_last_sent_move_precision = m_base_position.getDistanceFrom(
diff --git a/src/content_sao.h b/src/content_sao.h
index 507631d2a..53e701d8c 100644
--- a/src/content_sao.h
+++ b/src/content_sao.h
@@ -71,6 +71,7 @@ public:
 	void setSprite(v2s16 p, int num_frames, float framelength,
 			bool select_horiz_by_yawpitch);
 	std::string getName();
+	void setArmorGroups(const ItemGroupList &armor_groups);
 private:
 	void sendPosition(bool do_interpolate, bool is_movement_end);
 
@@ -90,6 +91,7 @@ private:
 	v3f m_last_sent_velocity;
 	float m_last_sent_position_timer;
 	float m_last_sent_move_precision;
+	bool m_armor_groups_sent;
 };
 
 #endif
diff --git a/src/luaentity_common.h b/src/luaentity_common.h
index b63663828..d12ec9f0e 100644
--- a/src/luaentity_common.h
+++ b/src/luaentity_common.h
@@ -47,6 +47,7 @@ struct LuaEntityProperties
 #define LUAENTITY_CMD_SET_TEXTURE_MOD 1
 #define LUAENTITY_CMD_SET_SPRITE 2
 #define LUAENTITY_CMD_PUNCHED 3
+#define LUAENTITY_CMD_UPDATE_ARMOR_GROUPS 4
 
 #endif
 
diff --git a/src/scriptapi.cpp b/src/scriptapi.cpp
index c3059ec55..541baa61c 100644
--- a/src/scriptapi.cpp
+++ b/src/scriptapi.cpp
@@ -2538,6 +2538,19 @@ private:
 		return 0;
 	}
 
+	// set_armor_groups(self, groups)
+	static int l_set_armor_groups(lua_State *L)
+	{
+		ObjectRef *ref = checkobject(L, 1);
+		LuaEntitySAO *co = getluaobject(ref);
+		if(co == NULL) return 0;
+		// Do it
+		ItemGroupList groups;
+		read_groups(L, 2, groups);
+		co->setArmorGroups(groups);
+		return 0;
+	}
+
 	// DEPRECATED
 	// get_entity_name(self)
 	static int l_get_entity_name(lua_State *L)
@@ -2700,6 +2713,7 @@ const luaL_reg ObjectRef::methods[] = {
 	method(ObjectRef, getyaw),
 	method(ObjectRef, settexturemod),
 	method(ObjectRef, setsprite),
+	method(ObjectRef, set_armor_groups),
 	method(ObjectRef, get_entity_name),
 	method(ObjectRef, get_luaentity),
 	// Player-only