Springer Precision 9mm +5 Tactical Base Pad For Glock 17/34 with extra power spring.  This tactical version has serrations machined 360 degrees around the extension to allow a strong finger purchase for when you absolutely must get a sure grip on your magazine.  Their extended capacity base pads are CNC machined from aluminum and hard anodized for a long service life. This lengthens the magazine and adds +5 rounds to your magazine.  The unique locking mechanism allows a very solid attachment with a simple backing out of the discrete set screw. 

*Includes a .050 hex driver that makes installation and removal a breeze.  1.40oz*

*Designed to fit on Glock 17/34 9mm mags only.  Will not fit Glock 40 cal mags*

DISCLAIMER: This product is not manufactured, authorized, endorsed, or warranted by GLOCK. GLOCK does not warrant or represent that this product is compatible with GLOCK pistols.