Advanced format ruling
Flint Lock
Card effect (current official text)Once per turn: You can target 1 "Flint" in the Spell & Trap Zone; equip it to this card. During your Main Phase: You can target 1 "Flint" equipped to this card, and 1 face-up monster on the field, except this card; equip that "Flint" to that targeted monster. This card can only be equipped with 1 "Flint". While equipped with "Flint", this card is unaffected by the effect of "Flint", and cannot be destroyed by battle.
Current rulings for this card are maintained by Konami.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Advanced forum — sourced change requests get reviewed.