diff --git a/data/json/items/armor/ammo_pouch.json b/data/json/items/armor/ammo_pouch.json
index 75d8f7bd027a0..6af7807031579 100644
--- a/data/json/items/armor/ammo_pouch.json
+++ b/data/json/items/armor/ammo_pouch.json
@@ -91,6 +91,7 @@
     "pocket_data": [
       {
         "pocket_type": "CONTAINER",
+        "max_item_length": "300 mm",
         "max_contains_volume": "1500 ml",
         "max_contains_weight": "2 kg",
         "moves": 40,
@@ -119,6 +120,7 @@
     "pocket_data": [
       {
         "pocket_type": "CONTAINER",
+        "max_item_length": "240 mm",
         "max_contains_volume": "750 ml",
         "max_contains_weight": "2 kg",
         "moves": 40,
@@ -147,6 +149,7 @@
     "pocket_data": [
       {
         "pocket_type": "CONTAINER",
+        "max_item_length": "240 mm",
         "max_contains_volume": "750 ml",
         "max_contains_weight": "2 kg",
         "moves": 40,
@@ -154,6 +157,7 @@
       },
       {
         "pocket_type": "CONTAINER",
+        "max_item_length": "240 mm",
         "max_contains_volume": "750 ml",
         "max_contains_weight": "2 kg",
         "moves": 40,
@@ -161,6 +165,7 @@
       },
       {
         "pocket_type": "CONTAINER",
+        "max_item_length": "240 mm",
         "max_contains_volume": "750 ml",
         "max_contains_weight": "2 kg",
         "moves": 40,
@@ -168,6 +173,7 @@
       },
       {
         "pocket_type": "CONTAINER",
+        "max_item_length": "240 mm",
         "max_contains_volume": "750 ml",
         "max_contains_weight": "2 kg",
         "moves": 40,
@@ -274,6 +280,7 @@
     "pocket_data": [
       {
         "pocket_type": "CONTAINER",
+        "max_item_length": "240 mm",
         "max_contains_volume": "250 ml",
         "max_contains_weight": "2 kg",
         "moves": 40,
@@ -303,6 +310,7 @@
     "pocket_data": [
       {
         "pocket_type": "CONTAINER",
+        "max_item_length": "240 mm",
         "max_contains_volume": "500 ml",
         "max_contains_weight": "2 kg",
         "moves": 40,
@@ -310,6 +318,7 @@
       },
       {
         "pocket_type": "CONTAINER",
+        "max_item_length": "240 mm",
         "max_contains_volume": "500 ml",
         "max_contains_weight": "2 kg",
         "moves": 40,
@@ -426,6 +435,7 @@
     "pocket_data": [
       {
         "pocket_type": "CONTAINER",
+        "max_item_length": "300 mm",
         "min_item_volume": "250 ml",
         "max_contains_volume": "1 L",
         "max_contains_weight": "2 kg",
@@ -434,6 +444,7 @@
       },
       {
         "pocket_type": "CONTAINER",
+        "max_item_length": "300 mm",
         "min_item_volume": "250 ml",
         "max_contains_volume": "1 L",
         "max_contains_weight": "2 kg",
@@ -442,6 +453,7 @@
       },
       {
         "pocket_type": "CONTAINER",
+        "max_item_length": "300 mm",
         "min_item_volume": "250 ml",
         "max_contains_volume": "1 L",
         "max_contains_weight": "2 kg",
@@ -450,6 +462,7 @@
       },
       {
         "pocket_type": "CONTAINER",
+        "max_item_length": "300 mm",
         "min_item_volume": "250 ml",
         "max_contains_volume": "1 L",
         "max_contains_weight": "2 kg",
@@ -492,6 +505,7 @@
     "pocket_data": [
       {
         "pocket_type": "CONTAINER",
+        "max_item_length": "240 mm",
         "min_item_volume": "250 ml",
         "max_contains_volume": "1 L",
         "max_contains_weight": "2 kg",
@@ -500,6 +514,7 @@
       },
       {
         "pocket_type": "CONTAINER",
+        "max_item_length": "240 mm",
         "min_item_volume": "250 ml",
         "max_contains_volume": "1 L",
         "max_contains_weight": "2 kg",
@@ -508,6 +523,7 @@
       },
       {
         "pocket_type": "CONTAINER",
+        "max_item_length": "240 mm",
         "min_item_volume": "250 ml",
         "max_contains_volume": "1 L",
         "max_contains_weight": "2 kg",
@@ -516,6 +532,7 @@
       },
       {
         "pocket_type": "CONTAINER",
+        "max_item_length": "240 mm",
         "min_item_volume": "250 ml",
         "max_contains_volume": "1 L",
         "max_contains_weight": "2 kg",
diff --git a/data/json/items/magazine/223.json b/data/json/items/magazine/223.json
index 7de4af45cbacc..15e061876a314 100644
--- a/data/json/items/magazine/223.json
+++ b/data/json/items/magazine/223.json
@@ -52,8 +52,9 @@
     "type": "MAGAZINE",
     "name": { "str": "STANAG 10-round magazine" },
     "description": "A compact 10-round box magazine for use with STANAG compatible rifles.",
-    "weight": "131 g",
-    "volume": "250 ml",
+    "weight": "145 g",
+    "volume": "160 ml",
+    "longest_side": "107 mm",
     "price": 5000,
     "price_postapoc": 100,
     "material": [ "steel" ],
@@ -126,8 +127,9 @@
     "type": "MAGAZINE",
     "name": { "str": "STANAG 5-round magazine" },
     "description": "A very compact 5-round box magazine for use with STANAG compatible rifles.",
-    "weight": "88 g",
-    "volume": "50 ml",
+    "weight": "120 g",
+    "volume": "130 ml",
+    "longest_side": "76 mm",
     "price": 4000,
     "material": [ "steel" ],
     "symbol": "#",
@@ -142,8 +144,9 @@
     "type": "MAGAZINE",
     "name": { "str": "STANAG 20-round magazine" },
     "description": "A compact 20-round box magazine for use with STANAG compatible rifles.",
-    "weight": "91 g",
-    "volume": "350 ml",
+    "weight": "210 g",
+    "volume": "230 ml",
+    "longest_side": "129 mm",
     "price": 4000,
     "material": [ "steel" ],
     "symbol": "#",
@@ -158,8 +161,9 @@
     "name": { "str": "STANAG 30-round magazine" },
     "//": "Tileset whitelist for rifle magazines",
     "description": "A standard capacity 30-round box magazine for use with STANAG compatible rifles.",
-    "weight": "360 g",
+    "weight": "265 g",
     "volume": "290 ml",
+    "longest_side": "190 mm",
     "price": 8000,
     "price_postapoc": 250,
     "material": [ "steel" ],
@@ -175,8 +179,9 @@
     "type": "MAGAZINE",
     "name": { "str": "STANAG 40-round magazine" },
     "description": "An increased-capacity 40-round box magazine for use with STANAG compatible rifles.",
-    "weight": "181 g",
-    "volume": "600 ml",
+    "weight": "220 g",
+    "volume": "390 ml",
+    "longest_side": "236 mm",
     "price": 8500,
     "material": [ "plastic", "steel" ],
     "symbol": "#",
@@ -191,8 +196,9 @@
     "type": "MAGAZINE",
     "name": { "str": "STANAG 50-round drum magazine" },
     "description": "A bulky 50-round drum magazine for use with STANAG compatible rifles, known as the X-15.",
-    "weight": "680 g",
-    "volume": "1 L",
+    "weight": "500 g",
+    "volume": "530 ml",
+    "longest_side": "114 mm",
     "price": 9000,
     "price_postapoc": 500,
     "to_hit": -2,
@@ -211,8 +217,9 @@
     "type": "MAGAZINE",
     "name": { "str": "STANAG 60-round magazine" },
     "description": "A high-capacity 60-round casket magazine for use with STANAG compatible rifles.",
-    "weight": "181 g",
-    "volume": "800 ml",
+    "weight": "240 g",
+    "volume": "600 ml",
+    "longest_side": "240 mm",
     "price": 12000,
     "material": [ "aluminum" ],
     "symbol": "#",
@@ -228,7 +235,8 @@
     "name": { "str": "STANAG 60-round drum magazine" },
     "description": "A bulky 60-round drum magazine for use with STANAG compatible rifles, known as the D-60.",
     "weight": "581 g",
-    "volume": "1050 ml",
+    "volume": "700 ml",
+    "longest_side": "188 mm",
     "price": 9250,
     "to_hit": -2,
     "bashing": 4,
@@ -246,8 +254,9 @@
     "type": "MAGAZINE",
     "name": { "str": "STANAG 90-round snail drum magazine" },
     "description": "A bulky 90-round snail drum magazine for use with STANAG compatible rifles.",
-    "weight": "567 g",
-    "volume": "1500 ml",
+    "weight": "630 g",
+    "volume": "1000 ml",
+    "longest_side": "200 mm",
     "price": 9500,
     "to_hit": -2,
     "bashing": 4,
@@ -265,8 +274,9 @@
     "type": "MAGAZINE",
     "name": { "str": "STANAG 100-round magazine" },
     "description": "A high-capacity 100-round casket magazine for use with STANAG compatible rifles.",
-    "weight": "272 g",
+    "weight": "337 g",
     "volume": "1 L",
+    "longest_side": "350 mm",
     "price": 15000,
     "material": [ "aluminum" ],
     "symbol": "#",
@@ -281,8 +291,9 @@
     "type": "MAGAZINE",
     "name": { "str": "STANAG 100-round double drum magazine" },
     "description": "A bulky 100-round double drum magazine for use with STANAG compatible rifles, known as the Beta-C Mag.",
-    "weight": "998 g",
+    "weight": "1700 g",
     "volume": "1200 ml",
+    "longest_side": "300 mm",
     "price": 14000,
     "material": [ "plastic", "steel" ],
     "symbol": "#",
@@ -300,6 +311,7 @@
     "description": "A bulky 150-round double drum magazine for use with STANAG compatible rifles, known as the SAW-MAG.",
     "weight": "2220 g",
     "volume": "1700 ml",
+    "longest_side": "343 mm",
     "price": 18000,
     "material": [ "plastic", "steel" ],
     "symbol": "#",