diff --git a/data/json/items/gun/4570.json b/data/json/items/gun/4570.json
index a5b9b4b13916c..761561d13ebbd 100644
--- a/data/json/items/gun/4570.json
+++ b/data/json/items/gun/4570.json
@@ -8,6 +8,7 @@
     "description": "A handy but powerful lever-action rifle chambered for .45-70 Government.  Designed for wilderness guides for defense against large predators such as grizzly bears, moose, and dinosaurs.",
     "weight": "3629 g",
     "volume": "1829 ml",
+    "longest_side": "943 mm",
     "price": 100000,
     "price_postapoc": 2500,
     "to_hit": 1,
@@ -44,6 +45,7 @@
     "description": "A massive single-action revolver.  While the .45-70 rifle round loses significant velocity in its short pistol barrel, it still competes with other large magnum handguns in terms of power.",
     "weight": "1950 g",
     "volume": "734 ml",
+    "longest_side": "491 mm",
     "price": 105000,
     "price_postapoc": 2750,
     "to_hit": -2,
@@ -77,7 +79,8 @@
     "//": "Specs from Uberti 32in barrel Special",
     "description": "A reproduction of an antique single-shot .45-70 rifle once used to hunt buffalo and other large game in the late 19th Century.  Highly accurate and powerful for the time, this one is made to handle modern smokeless ammunition.",
     "weight": "4819 g",
-    "volume": "3053 ml",
+    "volume": "2936 ml",
+    "longest_side": "1278 mm",
     "price": 210000,
     "price_postapoc": 2750,
     "to_hit": 1,