PETE'S PILLARS | PRECISION CZ RIMFIRE COMPONENTS
More Reach. More Grip. Easier Magazine Changes.
Cold fingers, hunting gloves, a tight shooting position—none of those should make you hunt for your magazine release. The USA-made PP457MRB Extended Bumpy Magazine Release puts a longer, textured catch right where you need it on your CZ 452, 453, 455, or 457. A small change you'll appreciate every time you swap magazines.
The difference is easy to feel. At 1.59 inches long, PP457MRB adds approximately 0.40 inches over the factory 1.19-inch release. Its raised, machined serrations give your finger a positive contact surface, making the catch easier to find and press without taking your eyes off what you're doing.
Whether you're reloading during a squirrel hunt, changing magazines at the bench, or moving through a competition stage, that extra reach matters. It's especially welcome when you're wearing gloves or shooting a CZ 457 in an aftermarket stock or chassis.
CNC-Machined Steel. Finished to Match Your CZ.
We CNC-machine PP457MRB from solid steel, case harden it, and finish it in a traditional blued, blue-black finish that looks right at home on a CZ bolt-action rimfire. The bumpy serrations aren't decoration—they give your finger a more positive purchase on the catch.
Backed by over six years of CZ rimfire experience, this is the kind of component Pete's Pillars makes best: straightforward, well-finished, and designed around how shooters actually use their rifles.
Pair It with a Radiused Magwell for Easier Changes
Getting the empty magazine out is only half the job. Pair PP457MRB with our PP457SR Radiused Magazine Well Spacer and you've got a terrific combination: the extended catch makes it easier to release the magazine, while the radiused entry helps guide the next one in. It's a particularly useful pairing for squirrel hunting, field shooting, competition, or magazine changes with gloves on.
Running an aftermarket aluminum magwell? PP457MRB also pairs well with the DIP Inc. 19048 and L3i aluminum magwell. Prefer the original squared magazine opening? Choose our PP457SB OEM-Style Aluminum Spacer. If you like the extra length but want a flat contact face, we also make the PP457MRS Extended Smooth Magazine Release.
A Better Feel in the Field or on a Chassis
Building out a CZ 457? The longer catch is a natural addition to rifles wearing the MDT Oryx, MDT Field Stock, or KRG Bravo. Competition shooters can explore the MDT LSS Gen3 Competitor, ACC Premier Gen2, and flagship ACC Elite.
From magazine controls to complete rifle-build upgrades, explore our CZ 457 Parts & Upgrades Collection.
Product Specifications
Manufacturer: Pete's Pillars
Part Number: PP457MRB
Product: Extended Bumpy Serrated Magazine Release Catch
Rifle Compatibility: CZ 452, CZ 453, CZ 455, CZ 457
Fitment: Drop-In Replacement for Factory Magazine Assemblies
Overall Length: 1.59 inches
Factory Release Length: Approximately 1.19 inches
Added Reach: Approximately 0.40 inches
Material: CNC-Machined Solid Steel
Surface Treatment: Case Hardened
Finish: Blued
Contact Surface: Machined Bumpy Serrations
Includes: One Magazine Release Catch
Manufactured: USA
Frequently Asked Questions
The fit, the feel, and what works with your rifle.
Will it fit my CZ 452, 453, 455, or 457?
Yes. PP457MRB is a direct replacement for the factory magazine release on all four models. Same familiar operation, with more reach and a textured face.
Is the extra length noticeable when wearing gloves?
Absolutely. The catch is about 0.40 inches longer than the factory release, and the bumpy serrations make it much easier to find by feel. That's handy on a cold squirrel hunt or when you're focused on the next shot at a match.
Does it work with DIP 19048 and L3i aluminum magwells?
Yes. The longer, textured release pairs well with both. It's an easy way to make the magazine catch more accessible when you're using an aluminum magwell.
Why add the PP457SR radiused spacer?
Because the two parts work together. The extended release helps you reach and operate the catch; the PP457SR's radiused opening helps guide the next magazine into place. Together, they make magazine changes easier in the woods, at the range, or during a match.
Should I get the bumpy or smooth magazine release?
Want more grip under your finger? Get the bumpy PP457MRB. Prefer a flat contact surface? Go with the smooth PP457MRS. Both are extended, USA-made steel releases; it's really about the feel you prefer.
Does it come with the spring and pin?
The package includes the extended release catch. You reuse the spring and retaining hardware already in your rifle.
Does it make sense on an Oryx or Field Stock or other chassis?
Definitely. An extended catch is especially nice on a CZ 457 wearing an Oryx, Field Stock, or competition chassis. It's easier to reach without having to look down and find the release every time you change magazines.
Over six years of CZ rimfire experience. Precision parts made in the USA.
Pete's Pillars. Small Change. Big Impact.
