This magazine lock kit is designed for the first generation AR-57 upper receiver. This fixed magazine lock kit allows the operator to remove the top-mounted magazine with the use of a tool. This kit should only be used with 10 round magazines.
Note: This kit is NOT compatible with the new Gen 2 AR-57 upper receiver.
This magazine lock has not been approved by the Californa DOJ.
This magazine lock is designed to conform to the law as written in CA Penal Code 978.20(a) which defines: "detachable magazine" means any ammunition feeding device that can be removed readily from the firearm with neither disassembly of the firearm action nor use of a tool being required. "A bullet or ammunition cartridge is considered a tool."