The Kel-Tec CP33 33-round magazine is a bit of an engineering marvel in the rimfire world. Because .22 LR is rimmed, it’s notoriously difficult to stack in high capacities without jamming, but Kel-Tec solved this using a quad-stack (double-double stack) "Casket" magazine design.
Key Features
- Capacity: 33 rounds of .22 LR.
- Material: Transparent (clear) polycarbonate, allowing you to see your remaining round count and check for rim-lock.
- Design: A "quad-stack" internal geometry that transitions into a single feed at the top.
- Compatibility: Designed specifically for the Kel-Tec CP33 pistol.
Pro-Tips for Reliability
If you’re picking these up, keep these two things in mind to avoid the dreaded "rim-lock" (where the rim of the top cartridge gets stuck behind the rim of the cartridge below it):
- The "Lula" Loader: While you can load these by hand, using the Maglula Kel-Tec CP33 loader is highly recommended. It ensures the rims are staggered correctly every time, which is the secret to making this gun run flawlessly.
- Don't "Tap" the Mag: Unlike AR-15 mags, you shouldn't slap the back of these to seat the rounds. This can actually cause the .22 LR rounds to jump out of their staggered alignment.
