ZEV Technologies Polymer Glock 17 +5 Rounds Pistol Magazine Extension FDE 5. Lightweight and durable. NOTE: GLOCK magazine not included. Not compatible with restricted capacity GLOCK magazines Specifications for ZEV Technologies Polymer Glock 17 +5 Rounds Pistol Magazine Extension: Manufacturer: ZEV Technologies Fabric/Material: Polymer/Steel Finish: Black DLC Magazine Capacity: 5 Round Caliber: 9mm Luger Gun Make: Glock Gun Model: Glock 19C Glock 17C Glock 34 Glock 17L Glock 17 Glock 26 Glock 19 Condition: Factory DEMO Features of ZEV Technologies Polymer Glock 17 +5 Rounds Pistol Magazine Extension Adds +5 9mm capacity Fits standard capacity GLOCK 9mm magazines 3-piece design is easy to reassemble without damaging the mag body Additional power spring provided Please Note: Basepads are intended for use with 17 round magazines. Package Contents: ZEV Technologies Polymer Glock 17 +5 Rounds Pistol Magazine Extension Extended Magazine Spring What firearm models does the manufacturer say ZEV Technologies Polymer Glock 17 +5 Rounds Pistol Magazine Extension is compatible with? The manufacturer says that ZEV Technologies Polymer Glock 17 +5 Rounds Pistol Magazine Extension is compatible with Glock 19 Glock 26 Glock 17 Glock 17L Glock 34 Glock 17C Glock 19CZEV Technologies BPAD-G17-5-FDE: Polymer Glock 17 +5 Rounds Pistol Magazine Extension FDE