Our latest version for Glock 43x/48. The color matches the follower to make it easy to locate the correct GTUL. Remove base pads, add extensions while maintaining the integrity of your magazines. Only device that works with both standard and extended base pads. With these smaller Glock magazines at times the indents for the magazine release can get snagged by the projections on the inside of GTUL.  To avoid this, when placing and removing this GTUL on these magazines keep the closed end pressed firmly against the front/ leading edge of the magazine.

US Patent 7,712,243