ZEV EXTNDD BASE PAD +5 FOR GLOCK BLK

ZEV Technologies, Extended Base Pad For Glock, Black Finish, Add +5 Capacity on 9mm, Add +4 Capacity on .40 Cal, Additional Power Spring Included, Glock Magazine Not Included, Fits 17Rd Capacity Glock 9mm & .40 Magazines, Does NOT Work w/10Rd or 15Rd Capacity Magazines