LOT of 5 Heckler & Koch HK P30SK/VP9SK 9mm 10-Round Magazine w/Ext Floor Plate – 50253428. HK VP9SK / P30SK 9mm 10 Round Magazine with pinky extension. This magazine will fit the HK VP9SK & P30SK 9mm pistols. The magazine also has a floor plate/ grip extension, that will help you complete the grip on your VP9SK or P30SK. Firearm Fit: HK P30SK.