H&K Pistol: Magazine Interchanges With:
USP 9mm USP 9mm 18 rd Jet Funnel mag
USP 40S&W USP 40S&W 16 rd Jet Funnel mag
USP .45ACP Mk23 .45 12 rd mag
Mk23 SOCOM .45 ACP no known cross-compatibility
USP Compact 9mm P2000 9mm 13 and 10 rd mags and P30 and P30L 9mm 15 and 10 rd mags
USP Compact .357 SIG USP Compact and P2000 40 S&W and .357 SIG 12 and 10 round mags
USP Compact .40 S&W USP Compact and P2000 40 S&W and .357 SIG 12 and 10 round mags
USP Compact .45 ACP HK45 10 rd mag
HK45 .45 ACP no known cross-compatibility
HK45 Compact .45 ACP USP Compact and HK45 Compact .45 ACP 8 rd mag
P30 9mm P30 and P30L 9mm 15 and 10 rd mags
P30L 9mm P30 and P30L 9mm 15 and 10 rd mags
P2000 9mm P2000 9mm 13 and 10 rd mags and P30 and P30L 9mm 15 and 10 rd mags
P2000 .357 SIG USP Compact and P2000 40 S&W and .357 SIG 12 and 10 round mags
P2000 .40 S&W USP Compact and P2000 40 S&W and .357 SIG 12 and 10 round mags
P2000sk 9mm P2000 9mm 13 and 10 rd mags and P30 and P30L 9mm 15 and 10 rd mags
P2000sk .357 SIG USP Compact and P2000 40 S&W and .357 SIG 12 and 10 round mags
P2000sk .40 S&W USP Compact and P2000 40 S&W and .357 SIG 12 and 10 round mags