Pillar CZ 455/457/512 Radiused Aluminum Magazine Well Spacer Block
The Pete's Pillars PP457SR Radiused Magazine Well Spacer replaces the factory plastic spacer with a precision CNC-machined aluminum component featuring an enlarged, radiused magazine opening.
Designed for compatible CZ 455, CZ 457, and CZ 512 .22 LR rifles, its rounded entry helps guide the magazine into position with less precise alignment. The result is a practical improvement for competition, benchrest shooting, hunting, and everyday range use.
Radiused Opening for Easier Magazine Insertion
The PP457SR features a generously radiused magazine entry instead of the squared opening found on the factory-style spacer.
This additional lead-in provides a more forgiving contact surface when inserting magazines, particularly during repeated magazine changes or when wearing gloves.
For shooters who prefer the original factory-style opening, we also manufacture the PP457SB Standard Aluminum Magazine Well Spacer.
CNC-Machined 6061 Aluminum
Each PP457SR is CNC machined from billet 6061 aluminum and finished in black anodizing.
Its rigid aluminum construction replaces the original molded plastic spacer with a durable metal component, maintaining the magazine positioning function while providing a more substantial replacement part.
The black finish complements factory CZ hardware and aftermarket rifle components.
Stainless Steel Retaining Pin Included
Every PP457SR includes a stainless steel retaining pin, providing replacement hardware alongside the aluminum magazine spacer.
The spacer and retaining pin correspond to the magazine well block and retaining hardware in compatible CZ assemblies.
CZ 455, CZ 457 & CZ 512 Compatibility
The PP457SR is designed for compatible .22 LR magazine configurations on the following platforms:
It replaces CZ factory part number 311233804014 in compatible applications.
This spacer is intended for the shorter .22 LR magazine arrangement. Compatibility with other caliber configurations depends on the rifle's magazine system.
Features & Benefits
- Radiused Opening: Enlarged lead-in for easier magazine alignment.
- 6061 Billet Aluminum: Rigid, CNC-machined construction.
- Black Anodized Finish: Durable protective surface.
- Stainless Retaining Pin: Included with every spacer.
- CZ Compatibility: Designed for compatible CZ 455, 457, and 512 .22 LR magazine systems.
- Factory Replacement: Replaces CZ part 311233804014.
Complete Your CZ Magazine Setup
Pete's Pillars manufactures complementary magazine components for CZ rimfire rifles, including magazine spacers, extended releases, and replacement hardware.
Product Specifications
- Manufacturer: Pete's Pillars
- Part Number: PP457SR
- Product: Radiused Aluminum Magazine Well Spacer Block
- Compatibility: CZ 455 / CZ 457 / CZ 512
- Application: Compatible .22 LR Magazine Systems
- Material: Billet 6061 Aluminum
- Finish: Black Anodized
- Opening: Radiused Magazine Entry
- OEM Reference: 311233804014
- Included: Aluminum Spacer Block and Stainless Steel Retaining Pin
The Pete's Pillars Difference
Pete's Pillars designs and manufactures rifle components that improve the small details of everyday shooting.
Our standard and radiused aluminum magazine spacers provide two practical alternatives to the original CZ plastic component, allowing shooters to choose the design that best suits their preferences.
Small change. Big impact.
