Spare magazine for USP 9mm,18 round, steel with polymer coating. Fits: USP9 Full, Tactical, Expert, Elite. 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 unless Jet funnel kit is installed. Fit: USP 9mm Full size USP 9mm Tactical USP 9mm Expert USP 9mm Elite