diff --git a/data/json/items/gun/bio.json b/data/json/items/gun/bio.json
index 83ba157d5cd0a..69b9216d8b776 100644
--- a/data/json/items/gun/bio.json
+++ b/data/json/items/gun/bio.json
@@ -58,7 +58,7 @@
     "color": "magenta",
     "skill": "pistol",
     "range": 30,
-    "ranged_damage": { "damage_type": "heat", "amount": 10, "armor_penetration": 15 },
+    "ranged_damage": { "damage_type": "heat", "amount": 10, "armor_penetration": 4 },
     "dispersion": 10,
     "durability": 10,
     "loudness": 7,
diff --git a/data/json/items/gun/ups.json b/data/json/items/gun/ups.json
index 6796517976cc5..903fe6c613b61 100644
--- a/data/json/items/gun/ups.json
+++ b/data/json/items/gun/ups.json
@@ -17,7 +17,7 @@
     "color": "cyan",
     "skill": "rifle",
     "range": 35,
-    "ranged_damage": { "damage_type": "electric", "amount": 45, "armor_penetration": 20 },
+    "ranged_damage": { "damage_type": "electric", "amount": 45, "armor_penetration": 4 },
     "dispersion": 10,
     "durability": 10,
     "modes": [ [ "DEFAULT", "semi-auto", 1 ], [ "AUTO", "auto", 3 ] ],
@@ -55,7 +55,7 @@
     "color": "blue",
     "skill": "rifle",
     "range": 30,
-    "ranged_damage": { "damage_type": "heat", "amount": 20, "armor_penetration": 20 },
+    "ranged_damage": { "damage_type": "heat", "amount": 20, "armor_penetration": 4 },
     "dispersion": 100,
     "durability": 8,
     "loudness": 12,
@@ -92,7 +92,7 @@
     "color": "blue",
     "skill": "rifle",
     "range": 45,
-    "ranged_damage": { "damage_type": "heat", "amount": 30, "armor_penetration": 20 },
+    "ranged_damage": { "damage_type": "heat", "amount": 30, "armor_penetration": 4 },
     "dispersion": 15,
     "durability": 8,
     "loudness": 1,
@@ -129,7 +129,7 @@
     "color": "magenta",
     "skill": "rifle",
     "range": 30,
-    "ranged_damage": { "damage_type": "heat", "amount": 10, "armor_penetration": 15 },
+    "ranged_damage": { "damage_type": "heat", "amount": 10, "armor_penetration": 4 },
     "dispersion": 90,
     "durability": 7,
     "loudness": 8,
@@ -166,7 +166,7 @@
     "color": "yellow",
     "skill": "rifle",
     "range": 30,
-    "ranged_damage": { "damage_type": "heat", "amount": 25, "armor_penetration": 15 },
+    "ranged_damage": { "damage_type": "heat", "amount": 25, "armor_penetration": 4 },
     "dispersion": 10,
     "durability": 8,
     "modes": [ [ "DEFAULT", "semi-auto", 1 ], [ "AUTO", "auto", 4 ] ],
@@ -205,7 +205,7 @@
     "color": "magenta",
     "skill": "pistol",
     "range": 30,
-    "ranged_damage": { "damage_type": "heat", "amount": 10, "armor_penetration": 15 },
+    "ranged_damage": { "damage_type": "heat", "amount": 10, "armor_penetration": 4 },
     "dispersion": 180,
     "durability": 8,
     "loudness": 7,