PETE'S PILLARS CZ 455 / 457 EXTENDED BUMPY MAGAZINE RELEASE | MADE IN USA
Find It Fast. Drop the Mag Every Time.
The Pete's Pillars PP457MRB replaces the CZ factory magazine release with a CNC-machined, case-hardened steel catch that reaches about 0.40″ farther than stock and carries machined bumpy serrations for a positive, no-slip press. Blued and made in the USA for the CZ 452, 453, 455 and 457.
The factory CZ release is short and smooth, and it's easy to miss when you're wearing gloves, shooting in the cold or tucked into a barricade position. The PP457MRB puts more catch where your finger goes, with a textured face you can find by feel without breaking position. It's one of the simplest upgrades you can make, and one you'll notice every time you change magazines. Use it for: NRL22 and PRS Rimfire stages, cold-weather hunting and any CZ that sees a lot of mag changes.
Built from Solid Steel.
Each release is CNC-machined from solid steel, then case hardened and blued for a durable, wear-resistant surface that matches the classic CZ finish. At 1.59″ overall versus about 1.19″ for factory, it adds real reach without getting in the way, and it reuses the spring and retaining hardware already in your rifle. Prefer a flat face? Our PP457MRS Extended Smooth Release gives you the same reach with a clean, smooth surface.
Complete the Mag Change Upgrade
Pair the release with a better mag well and the rest of our Made-in-USA CZ 457 upgrades.
Made in USAPP457SR Radiused Spacer Block
Wider lead-in for smoother, gloved mag changes.
View Product
Made in USAPP4KG Bolt Knob
Slim knurled, grooved billet knob for faster cycling.
View Product
Made in USAPP457FP-T Firing Pin
The CZ 457 part we're known for.
View Product
Made in USAPP457LCI Cocking Indicator
Extended stainless indicator you can see and feel.
View ProductFeed It Right.
A better release deserves better magazines. We carry billet aluminum magazines from L3i in 10 and 13 rounds and from Position7 in 10 and 13 rounds, plus the factory CZ 10-Round Polymer Magazine. Upgrading the mag well too? The PP457MRB works with the DIP CZ19048 Aluminum Mag Well and L3i aluminum mag wells.
The Next Step: A Match Barrel.
Pair It With Lilja
Lilja CZ 455/457 24″ 1.180″ Match Barrel
With the controls dialed in, the barrel is the next big step for any CZ 457. Lilja's 1.180″ straight contour uses a three-groove, individually hand-lapped 416 stainless bore and the Lilja 3 match chamber, with a headspace shim kit included. Prefer a lighter build? See the Lilja 26″ .900 Straight Taper or the L3i 24″ Drop-In Match Barrel.
See the Lilja 1.180″ Barrel →Give it a competition home with the MDT ACC Elite, ACC Premier Gen2, LSS Gen3 Competitor, XLR Element 4.0, MDT Field Stock, Oryx Sportsman or Grey Birch LaChassis. Feed it with L3i or Position7 billet magazines and the DIP Aluminum Mag Well. Starting fresh? The CZ 457 Varmint MTR Barreled Action is a proven foundation.
Did You Know?
Pete's Pillars Carries More Than CZ 457 Parts.
From centerfire chassis to optics and reloading, outfit every rifle in the safe in one place.
Optics & Mounts
Bipods & Magazines
Product Specifications
Manufacturer: Pete's Pillars
Product: Extended Bumpy Serrated Magazine Release
MPN: PP457MRB
Compatible Rifles: CZ 452, 453, 455 and 457
Replaces: Factory Magazine Release
Overall Length: 1.59″ (approx. 0.40″ longer than factory)
Material: CNC-Machined Solid Steel
Treatment / Finish: Case Hardened, Blued
Contact Surface: Machined Bumpy Serrations
Installation: Reuses Factory Spring and Retaining Hardware
Includes: One Magazine Release
Manufactured: Made in USA by Pete's Pillars
Frequently Asked Questions
Fitment, bumpy vs. smooth, mag wells and completing your CZ.
Which rifles does the PP457MRB fit?
It's made for the CZ 452, 453, 455 and 457.
Will it fit my rifle?
Our parts fit most CZ rifles. We machine to very tight tolerances, so every now and then a production rifle with factory tolerance stack-up falls a little outside that range.
Bumpy or smooth: which should I choose?
Choose the bumpy PP457MRB for maximum grip with gloves or in the cold. Choose the PP457MRS Smooth Release if you prefer a clean, flat face. Both have the same extended reach.
Does it work with aftermarket mag wells?
Yes. It works with our PP457SR and PP457SB spacer blocks, the DIP CZ19048 Mag Well and L3i aluminum mag wells.
Which is better, the PP457MRB or the DIP Extended Magazine Catch?
We only carry parts we trust, can stand behind and know are built with quality, so you're in good hands either way. The DIP Extended Magazine Catch is a solid option. Of course, we're partial to ours: solid case-hardened steel, machined serrations and made in the USA by Pete's Pillars.
What's included?
One magazine release. It reuses the spring and retaining hardware from your rifle.
What else should I upgrade?
Add the PP457SR Radiused Spacer Block for smoother mag insertion, then complete the bolt with our PP457FP-T Firing Pin and PP457LCI. See everything in our CZ 457 Parts Collection.
Small Change. Big Impact. Pete's Pillars.
PETE'S PILLARS CZ 455 / 457 EXTENDED BUMPY MAGAZINE RELEASE | MADE IN USA
Find It Fast. Drop the Mag Every Time.
The Pete's Pillars PP457MRB replaces the CZ factory magazine release with a CNC-machined, case-hardened steel catch that reaches about 0.40″ farther than stock and carries machined bumpy serrations for a positive, no-slip press. Blued and made in the USA for the CZ 452, 453, 455 and 457.
The factory CZ release is short and smooth, and it's easy to miss when you're wearing gloves, shooting in the cold or tucked into a barricade position. The PP457MRB puts more catch where your finger goes, with a textured face you can find by feel without breaking position. It's one of the simplest upgrades you can make, and one you'll notice every time you change magazines. Use it for: NRL22 and PRS Rimfire stages, cold-weather hunting and any CZ that sees a lot of mag changes.
Built from Solid Steel.
Each release is CNC-machined from solid steel, then case hardened and blued for a durable, wear-resistant surface that matches the classic CZ finish. At 1.59″ overall versus about 1.19″ for factory, it adds real reach without getting in the way, and it reuses the spring and retaining hardware already in your rifle. Prefer a flat face? Our PP457MRS Extended Smooth Release gives you the same reach with a clean, smooth surface.
Complete the Mag Change Upgrade
Pair the release with a better mag well and the rest of our Made-in-USA CZ 457 upgrades.
Made in USAPP457SR Radiused Spacer Block
Wider lead-in for smoother, gloved mag changes.
View ProductMade in USAPP4KG Bolt Knob
Slim knurled, grooved billet knob for faster cycling.
View ProductMade in USAPP457FP-T Firing Pin
The CZ 457 part we're known for.
View ProductMade in USAPP457LCI Cocking Indicator
Extended stainless indicator you can see and feel.
View ProductFeed It Right.
A better release deserves better magazines. We carry billet aluminum magazines from L3i in 10 and 13 rounds and from Position7 in 10 and 13 rounds, plus the factory CZ 10-Round Polymer Magazine. Upgrading the mag well too? The PP457MRB works with the DIP CZ19048 Aluminum Mag Well and L3i aluminum mag wells.
The Next Step: A Match Barrel.
Pair It With Lilja
Lilja CZ 455/457 24″ 1.180″ Match Barrel
With the controls dialed in, the barrel is the next big step for any CZ 457. Lilja's 1.180″ straight contour uses a three-groove, individually hand-lapped 416 stainless bore and the Lilja 3 match chamber, with a headspace shim kit included. Prefer a lighter build? See the Lilja 26″ .900 Straight Taper or the L3i 24″ Drop-In Match Barrel.
See the Lilja 1.180″ Barrel →Give it a competition home with the MDT ACC Elite, ACC Premier Gen2, LSS Gen3 Competitor, XLR Element 4.0, MDT Field Stock, Oryx Sportsman or Grey Birch LaChassis. Feed it with L3i or Position7 billet magazines and the DIP Aluminum Mag Well. Starting fresh? The CZ 457 Varmint MTR Barreled Action is a proven foundation.
Did You Know?
Pete's Pillars Carries More Than CZ 457 Parts.
From centerfire chassis to optics and reloading, outfit every rifle in the safe in one place.
Optics & Mounts
Bipods & Magazines
Product Specifications
Manufacturer: Pete's Pillars
Product: Extended Bumpy Serrated Magazine Release
MPN: PP457MRB
Compatible Rifles: CZ 452, 453, 455 and 457
Replaces: Factory Magazine Release
Overall Length: 1.59″ (approx. 0.40″ longer than factory)
Material: CNC-Machined Solid Steel
Treatment / Finish: Case Hardened, Blued
Contact Surface: Machined Bumpy Serrations
Installation: Reuses Factory Spring and Retaining Hardware
Includes: One Magazine Release
Manufactured: Made in USA by Pete's Pillars
Frequently Asked Questions
Fitment, bumpy vs. smooth, mag wells and completing your CZ.
Which rifles does the PP457MRB fit?
It's made for the CZ 452, 453, 455 and 457.
Will it fit my rifle?
Our parts fit most CZ rifles. We machine to very tight tolerances, so every now and then a production rifle with factory tolerance stack-up falls a little outside that range.
Bumpy or smooth: which should I choose?
Choose the bumpy PP457MRB for maximum grip with gloves or in the cold. Choose the PP457MRS Smooth Release if you prefer a clean, flat face. Both have the same extended reach.
Does it work with aftermarket mag wells?
Yes. It works with our PP457SR and PP457SB spacer blocks, the DIP CZ19048 Mag Well and L3i aluminum mag wells.
Which is better, the PP457MRB or the DIP Extended Magazine Catch?
We only carry parts we trust, can stand behind and know are built with quality, so you're in good hands either way. The DIP Extended Magazine Catch is a solid option. Of course, we're partial to ours: solid case-hardened steel, machined serrations and made in the USA by Pete's Pillars.
What's included?
One magazine release. It reuses the spring and retaining hardware from your rifle.
What else should I upgrade?
Add the PP457SR Radiused Spacer Block for smoother mag insertion, then complete the bolt with our PP457FP-T Firing Pin and PP457LCI. See everything in our CZ 457 Parts Collection.
Small Change. Big Impact. Pete's Pillars.
| Brand | Pete's Pillars |
| Gun Platform | CZ 457 |
| Type | Magazine Release |
| Material | Steel |