CZ 455 / 457 / 512 Billet Aluminum Magazine Well Spacer Block – PP457SB
Replace the factory plastic magazine well spacer with a durable Pete's Pillars billet aluminum replacement for compatible CZ 455, CZ 457, and CZ 512 rifles.
The PP457SB retains the traditional factory-style magazine opening while replacing the original plastic component with a rigid, CNC-machined 6061 aluminum spacer block.
It is designed for .22 LR magazine applications, including compatible CZ rimfire configurations using the spacer block to properly position the shorter .22 LR magazine.
OEM-Style Profile in Billet Aluminum
The PP457SB follows the familiar factory-style spacer profile for shooters who want a straightforward replacement without changing the shape of the magazine opening.
Instead of molded plastic, each block is CNC machined from billet 6061 aluminum and finished in black anodizing for a clean, durable, low-maintenance replacement.
- Factory-style magazine opening
- CNC machined from billet 6061 aluminum
- Black anodized finish
- Rigid replacement for the factory plastic spacer
- Designed for .22 LR magazine applications
- Bonus stainless retaining pin included
Consistent Magazine Positioning
The magazine well spacer helps locate and support the magazine within the rifle. As factory plastic components age, they can wear, deform, or develop additional movement.
The rigid billet aluminum PP457SB provides a crisp, repeatable interface with less material variation than a worn plastic spacer, helping remove one unnecessary variable from magazine positioning and cartridge presentation.
Small change. Less variation. More consistency.
CZ 455, CZ 457 & CZ 512 Compatibility
The PP457SB is designed for compatible CZ 455, CZ 457, and CZ 512 rifles using the factory-style .22 LR magazine spacer arrangement.
It can also be used in properly configured CZ rimfire conversion setups where a .17 HMR or .22 WMR rifle is being configured to use the shorter .22 LR magazine system.
This part replaces CZ factory part number 311233804014.
Browse additional components on our
CZ 457 Parts & Upgrades
page.
Bonus Stainless Retaining Pin Included
Each PP457SB includes a stainless steel retaining pin at no additional charge, giving you a fresh pin for installation rather than requiring the original factory pin to be reused.
Factory Style or Radiused?
The PP457SB is the best choice for shooters who want the traditional factory-style magazine opening in a durable billet aluminum replacement.
For shooters who want a larger, more forgiving lead-in for faster and easier magazine insertion, we also offer our radiused CZ 455 / 457 / 512 aluminum magazine well spacer block.
Complete Your CZ Magazine Setup
Product Details
- Brand: Pete's Pillars
- Part Number: PP457SB
- Product: OEM-Style Magazine Well Spacer Block
- Platforms: CZ 455 / CZ 457 / CZ 512
- Application: .22 LR Magazine System
- Material: Billet 6061 Aluminum
- Finish: Black Anodized
- Replaces CZ Part: 311233804014
- Included: Stainless Steel Retaining Pin
Installation requires basic mechanical or gunsmithing knowledge. Always verify that the firearm is completely unloaded before beginning installation.
Small change. Less variation. More consistency.
