XGRIP - Magazine Sleeve Provides Better Grip (Magazine Sleeve G17/22 to G26/27) No Tools Required! Made in the USA Its unique design is based on the anthropometrics of the hand and wrist and results in significantly improved comfort, control and accuracy. Compatible with Gen 3 or Gen 4 OEM Factory Mags Only! Use the Glock 17/22 Mag in Glock 26/27 Pistol