Skyrim Mod:Mod File Format/ARMO

An ARMO record is an individual equippable piece, the most obvious of which is armor but includes shields, jewelry, clothing.

Models as they exist here are specifically referring to ground and inventory models, ARMA models cover worn.

If MOD4 is not present, MOD2 is used for female characters instead.

C	V	Field	Name	Type/Size	Info
+		EDID	editorID	zstring	Max ::0x200 bytes, including null terminator.
-		VMAD	scripting info	VMAD	scripting
-		OBND	object bounds	OBND	Always 12 bytes, even if all 0s
-		FULL	full name	lstring	Full (in-game) name
-		EITM	enchantment	formid	Enchanment (ENCH). Note there can be only 1 of these.
-		EAMT	Enchantment Amount	uint16	Enchantment Amount
-		MODL	model	MODL	Includes Fields MODB, MODT, MODS, MODD
+		MOD2	male model	zstring	Male Models\ relative .nif
-		MO2T	model data	struct	(MODT)
-		MO2S	alternate textures	Alternate Textures	Used when overriding textures in a nif file with texture sets
-		ICON	Inventory Image	zstring	Inventory Image Filename
-		MICO	Message Image	zstring	Message Image Filename
-		MOD4	female model	zstring	Female Models\ relative .nif
-		MO4T	model data	struct	(MODT)
-		MO4S	alternate textures	Alternate Textures	Used when overriding textures in a nif file with texture sets
-		ICO2	Inventory Image	zstring	Female Inventory Image Filename
-		MIC2	Message Image	zstring	Female Message Image Filename
+		BODT	Body Template	BODT	8- or 12-byte struct Body Template
+	1.6.91	BOD2	Body Template	BOD2	8-byte struct Body Template
-		DEST	destruction data	DEST	Includes Fields DSTD, DMDL, DMDT, DMDS
+		YNAM	pickupSound	formid	Sound(SNDR) played when picked up
+		ZNAM	dropSound	formid	Sound(SNDR) played when dropped
-		BMCT	Ragdoll	string	Ragdoll Constraint Template, not found in original (PC) datafiles
-		ETYP	equip slot	formid	EQUP (only shields)
-		BIDS	bash impact data set	formid	IPDS (only shields)
-		BAMT	bash material	formid	MATT (only shields)
+		RNAM	unknown	formID	RACE (0x19 DefaultRace for most except race-specific skins)
-		KSIZ	KSIZ	uint32	keyword count
-		KWDA	KWDA	formID[KSIZ]	KYWD array
+		DESC	description	lstring	Usually 0 unless the enchantment isn't standard like Archmage Robes.
*		MODL	armature (model)	formid	Armature ARMA formid. Required, can use more than 1 either as options (race options) or to cover multiple slots.
+		DATA	data	struct	8-byte struct uint32 Base value float Weight
+		DNAM	armor rating	uint32	Base armor rating * 100. (Note: despite being a uint32, only the lower uint16 is used.)
-		TNAM	template	formID	Points to another ARMO record to use as a template

The skill in the BODT/BOD2 field determines which skill gets xp added on hits. A higher level in that skill also increases the armor rating. If skill is "None", any value in the DNAM field is ignored and the armor rating is 0 (is that true for NPCs too?).

For unenchanted armor the gold value is found in DATA.Value - called base_value in the following. For enchanted armor the CK shows only the base_value, but that's not what's used ingame:

 gold_value = base_value + [enchantment_cost + 0.5]