Prevent constructing arrow boxes

mods/ENTITIES/mobs_mc/2_throwing.lua

@@ -15,15 +15,18 @@ local c = mobs_mc.is_item_variable_overridden
 
 minetest.register_node("mobs_mc:arrow_box", {
 	drawtype = "nodebox",
+	is_ground_content = false,
 	node_box = {
 		type = "fixed",
 		fixed = {
 			-- Shaft
-			{-6.5/17, -1.5/17, -1.5/17, 6.5/17, 1.5/17, 1.5/17},
-			--Spitze
+			{-6.5/17, -1.5/17, -1.5/17, -4.5/17, 1.5/17, 1.5/17},
+			{-4.5/17, -0.5/17, -0.5/17, 5.5/17, 0.5/17, 0.5/17},
+			{5.5/17, -1.5/17, -1.5/17, 6.5/17, 1.5/17, 1.5/17},
+			-- Tip
 			{-4.5/17, 2.5/17, 2.5/17, -3.5/17, -2.5/17, -2.5/17},
 			{-8.5/17, 0.5/17, 0.5/17, -6.5/17, -0.5/17, -0.5/17},
-			--Federn
+			-- Fletching
 			{6.5/17, 1.5/17, 1.5/17, 7.5/17, 2.5/17, 2.5/17},
 			{7.5/17, -2.5/17, 2.5/17, 6.5/17, -1.5/17, 1.5/17},
 			{7.5/17, 2.5/17, -2.5/17, 6.5/17, 1.5/17, -1.5/17},
@@ -36,7 +39,16 @@ minetest.register_node("mobs_mc:arrow_box", {
 		}
 	},
 	tiles = {"mcl_bows_arrow.png^[transformFX", "mcl_bows_arrow.png^[transformFX", "mcl_bows_arrow_back.png", "mcl_bows_arrow_front.png", "mcl_bows_arrow.png", "mcl_bows_arrow.png^[transformFX"},
-	groups = {not_in_creative_inventory=1},
+	paramtype = "light",
+	paramtype2 = "facedir",
+	sunlight_propagates = true,
+	groups = {not_in_creative_inventory=1, dig_immediate=3},
+	node_placement_prediction = "",
+	on_construct = function(pos)
+		minetest.log("error", "[mobs_mc] Trying to construct mobs_mc:arrow_box at "..minetest.pos_to_string(pos))
+		minetest.remove_node(pos)
+	end,
+	drop = "",
 })
 
 local THROWING_ARROW_ENTITY={

mods/ITEMS/mcl_bows/arrow.lua

@@ -67,6 +67,12 @@ minetest.register_node("mcl_bows:arrow_box", {
 	paramtype2 = "facedir",
 	sunlight_propagates = true,
 	groups = {not_in_creative_inventory=1, dig_immediate=3},
+	drop = "",
+	node_placement_prediction = "",
+	on_construct = function(pos)
+		minetest.log("error", "[mcl_bows] Trying to construct mcl_bows:arrow_box at "..minetest.pos_to_string(pos))
+		minetest.remove_node(pos)
+	end,
 })
 
 local ARROW_ENTITY={