More room to grab, encloses the mag catch somewhat - TANDEMKROSS Maverick Extended Magazine Base Pads, Kel-Tec PMR-30/CMR-30

These come in pairs. I like how these extend the space to grab/extract magazines which is helpful for the CP-33 since it hase a stiff fitting mag anyway. These are easy to install and they also look cooler, for what that is worth. It guards the mag catch a bit but you can still easily remove magazines from the gun.