diff --git a/data/json/items/gunmod/conversions.json b/data/json/items/gunmod/conversions.json
index 2d185790d7e86..65e83c98bd8ee 100644
--- a/data/json/items/gunmod/conversions.json
+++ b/data/json/items/gunmod/conversions.json
@@ -423,10 +423,10 @@
     "overwrite_min_cycle_recoil": 83,
     "//0": "AR has too big recoil for .22 round, 83 is right on the edge of being able to use blackpowder loaded and ratshot",
     "ammo_modifier": [ "22" ],
-    "magazine_adaptor": [ [ "22", [ "22_ar15mag_10", "22_ar15mag_28" ] ] ],
+    "magazine_adaptor": [ [ "22", [ "22_ar15mag_10", "  22_ar15mag_28" ] ] ],
     "pocket_mods": [ { "pocket_type": "MAGAZINE_WELL", "item_restriction": [ "22_ar15mag_10", "22_ar15mag_28" ] } ],
     "min_skills": [ [ "weapon", 2 ] ],
-    "damage_modifier": 2,
+    "damage_modifier": { "damage_type": "bullet", "amount": 2 },
     "add_mod": [ [ "brass catcher", 1 ], [ "bayonet lug", 1 ], [ "rail", 2 ], [ "sights", 1 ], [ "underbarrel", 1 ], [ "muzzle", 1 ] ]
   },
   {
diff --git a/doc/JSON_INFO.md b/doc/JSON_INFO.md
index 92ab4535c7d2d..221a070661d46 100644
--- a/doc/JSON_INFO.md
+++ b/doc/JSON_INFO.md
@@ -4199,7 +4199,7 @@ Gun mods can be defined like this:
 "ammo_modifier": [ "57" ],     // Optional field which if specified modifies parent gun to use these ammo types
 "magazine_adaptor": [ [ "223", [ "stanag30" ] ] ], // Optional field which changes the types of magazines the parent gun accepts
 "pocket_mods": [ { "pocket_type": "MAGAZINE_WELL", "item_restriction": [ "ai_338mag", "ai_338mag_10" ] } ], // Optional field, alters the original pockets of the weapon ; share the syntax with pocket_data; pocket type MAGAZINE and MAGAZINE_WELL are always overwritten, pocket type CONTAINER is always added to existing pockets; for MAGAZINE and MAGAZINE_WELL both ammo_modifier and magazine_adaptor fields are required to correctly migrate ammo type; type: TOOLMOD can use this field also
-"damage_modifier": -1,         // Optional field increasing or decreasing base gun damage
+"damage_modifier": { "damage_type": "bullet", "amount": -1 }, // Optional field increasing or decreasing base gun damage
 "dispersion_modifier": 15,     // Optional field increasing or decreasing base gun dispersion
 "loudness_modifier": 4,        // Optional field increasing or decreasing base guns loudness
 "range_modifier": 2,           // Optional field increasing or decreasing base gun range