MK23 Magazines / Extensions

HKP/H&K 17 Round HK Mark 23/USP .45 ACP Complete Magazine Each mag comes fully assembled and ready for use. HK Parts takes an existing German HK 12 round mag coupled with the +5 mag extension and assembles them into a complete 17 round mag. What you...

HKP 17 Round HK USP .45 ACP/Mark 23 Enhanced Magazine - Black Our 17 round magazine starts life as a factory HK 12 round magazine then gets a capacity bump with our +5 mag extension. Compatible With: HK USP .45 HK Mark 23

Magazine Extension Complete - 19 Round - HK Mark 23/USP .45 Designed specifically for the Mark 23 and USP .45—perfect for those who want extra firepower at the range. Each magazine comes fully assembled and ready for immediate use. We expertly take...