USP 9mm 31 round magazine. Will also fit all HK USP 9mm full size handguns. This item can be used with or without the jet funnel mag well installed. Note: the magazine will extend below the bottom of the magazine well on a standard USP pistols.

Fits:

• USP 9mm Full size 
• USP 9mm Tactical
• USP 9mm Expert
• USP 9mm Elite