The SJC Aluminum IPSC Mag Well fits in the boxes of IDPA, USPSA, and IPSC. It is perfect for tactical use yet small enough for daily carry. The SJC IPSC mag well makes reloads easier to hit which equates to faster reloads. But, it also greatly improves your grip to provide significant benefits in control of recoil and muzzle flip. Fits small frame glocks: G17, G22, G34, G35, G17L, G24. Works well with and without extended base pads. Gen 4 grip panels must be modified at their bottom edge if used.