PDFWAC 296-52-70040
Construction for Type 3 magazines.
(1) Sides, bottoms, and covers must be constructed with a minimum of number 12 gauge metal and lined with a nonsparking material.
(2) Hinges and hasps must be attached so they cannot be removed from the outside.
(3) One steel padlock, which does not need to be protected by a steel hood, having a minimum of five tumblers and a case hardened shackle of a minimum of 3/8-inch diameter is sufficient for locking purposes.