The Steyr URS retrofit kit requires requires and is to be used only with the Raddlock MSAR STG-556 magazine lock. This add-on allows the Raddlock MSAR STG-556 to be fitted onto a Steyr USR rifle.
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."
