This replacement magazine is a factory original from IWI. Factory replacement parts are manufactured to the exact same specifications and tolerances and use the same manufacturing materials as the original parts which guarantees excellent fit and reliable operation. Keeping a few extra factory magazines around is never a bad idea; extra magazines save loading time at the range and also serve as a backup for those days when you simply cannot remember where you put your primary magazine. NoteJericho Ten (10) round magazines with a polymer baseplate are compatible with: PL-910, PL-9, PSL-910, PSL-9, F-910, F-9, FS-910, FS-9Jericho II seventeen (17) round magazines are compatible with the Jericho II and steel or polymer Jericho 941 9mm pistols (PL-9, PSL-9, F-9, FS-9)