- 5 sizes that give you the option to increase magazine length by 2.5, 4,7,8, or 11 mm.
- Increase your capacity by 1, 2, or 3 rounds varying on caliber 140 mm USPSA legal.
- Consists of Basepad and U-pin.
NOTE: The 4mm will allow you to take advantage of the extra leeway the new gauge gives you. It's extremely close. Shooters must make sure their specific mag fits the gauge.