EGW HD CZ 457 Picatinny Rail Mount 40 MOA
Quick Check:
Fits: CZ 457 rifles
Receiver Interface: Factory 11mm Dovetail
Rail Type: One-Piece Picatinny
Series: Heavy Duty
Elevation: 40 MOA
Material: 7075-T6 Aluminum
Finish: Black Type III Hardcoat Anodized
Overall Length: 6.276"
Height: .540" from top of receiver to top of Picatinny rail
Weight: 4.6 oz
Mounting Hardware: #6-32 x 3/4" SHC Screws Included
Installation Bit: T-10 Included
Recommended Torque: 20 in-lbs
SKU: 80934
40 MOA IS INTENDED FOR EXTENDED-RANGE USE
This rail has 40 MOA of built-in elevation. It is intended for shooters who need substantial additional scope adjustment for long-range and extreme long-range rimfire shooting. Before choosing a 40 MOA base, make sure your optic has sufficient internal adjustment to establish your desired close-range zero.
Product Overview
The EGW HD CZ 457 40 MOA Picatinny Rail gives CZ 457 shooters a heavy-duty one-piece optic mounting platform designed for precision rimfire and extended-range applications.
Machined from solid 7075-T6 aluminum, the HD rail provides a rigid mounting platform while maintaining the weight advantages of aluminum. The rail is finished with Black Type III Hardcoat Anodizing for additional surface hardness and durability.
The mount interfaces with the factory 11mm dovetail on the CZ 457 receiver and provides a full-length Picatinny mounting surface for greater flexibility when positioning your scope rings.
This version incorporates 40 MOA of built-in cant, preserving significantly more of the scope's available elevation adjustment for shooters pushing .22 LR and other CZ 457 configurations to extended distances.
Technical Specifications
- SKU: 80934
- Brand: CZ
- Model: 457
- Mount Series: Heavy Duty
- Rail Type: One-Piece Picatinny
- Elevation: 40 MOA
- Receiver Interface: 11mm Dovetail
- Material: Solid 7075-T6 Aluminum
- Finish: Black Type III Hardcoat Anodized
- Overall Length: 6.276"
- Ejection Port Opening: 1.6"
- Height: .540" from top of receiver to top of Picatinny rail
- Weight: 4.6 oz
- Quick Disconnect Ring Compatible: Yes
- Ambidextrous: No
- Mounting Hardware: #6-32 x 3/4" SHC Screws Included
- Installation Bit: T-10 Included
- Recommended Torque: 20 in-lbs
- Made In: USA
Designed Specifically for the CZ 457
This HD rail is designed specifically around the CZ 457 receiver and its factory 11mm dovetail.
Rather than mounting scope rings directly to the factory dovetail, the EGW rail provides a continuous Picatinny mounting surface. This gives you considerably more flexibility when selecting and positioning scope rings for proper eye relief.
The rail is designed for the CZ 457 platform and should not be assumed to fit CZ 452, 453, 455, or other CZ receivers.
CZ 457 FITMENT
This mount is designed for the CZ 457 receiver. CZ rimfire models use different receiver configurations, so do not order based solely on the appearance of the factory dovetail.
Why Choose 40 MOA?
A scope has a limited amount of internal elevation adjustment. As shooting distance increases, increasingly more elevation is required to compensate for bullet drop.
A 40 MOA rail angles the optic downward relative to the bore. When the rifle is zeroed, this allows more of the scope's internal adjustment range to remain available for dialing upward at extended distances.
That makes the 40 MOA version particularly useful for extreme long-range rimfire, precision rimfire competition, and shooters who regularly dial substantial elevation.
CHOOSING YOUR MOA
0 MOA: Neutral mounting surface for general-purpose and conventional-distance shooting.
20 MOA: Adds useful elevation for longer-range rimfire shooting while remaining suitable for a wide range of setups.
40 MOA: Provides substantially more built-in elevation for shooters pushing the CZ 457 to extended and extreme rimfire distances.
Important: The amount of cant your setup can use depends on the internal elevation range of your optic and your desired zero distance. Verify that your scope can still achieve your preferred zero before selecting a 40 MOA rail.
Heavy Duty 7075-T6 Construction
EGW HD scope rails are machined from solid 7075-T6 aluminum.
Compared with the 6061 aluminum used in many lightweight scope bases, 7075-T6 provides increased strength and rigidity while retaining the weight advantages of an aluminum mounting system.
This makes the HD Series well suited to precision rifles, competition setups, and other applications where a rigid optic mounting platform is a priority.
Black Type III Hardcoat Anodized Finish
After machining, the rail receives a Black Type III Hardcoat Anodized finish.
The hardcoat process increases surface hardness and provides a durable matte-black exterior for regular competition, range, and field use.
Full-Length Picatinny Mounting Surface
Picatinny cross slots run along the rail to provide multiple positions for scope ring placement.
This flexibility makes it easier to establish proper ring spacing and eye relief, particularly with longer precision scopes and optics with limited mounting-tube space.
The one-piece design also provides a continuous mounting platform across the receiver rather than relying on separate front and rear bases.
Built for Precision Rimfire
The CZ 457 has become a popular platform for NRL22, PRS Rimfire, precision target shooting, and long-range rimfire builds.
For shooters using high-magnification optics and dialing elevation for distant targets, the 40 MOA rail provides additional adjustment capability while retaining the strength and flexibility of the EGW HD Picatinny system.
Why Choose the EGW HD CZ 457 40 MOA Rail?
- ✔ Designed specifically for the CZ 457
- ✔ Interfaces with the factory 11mm receiver dovetail
- ✔ 40 MOA of built-in elevation
- ✔ Designed for extended-range rimfire applications
- ✔ Machined from solid 7075-T6 aluminum
- ✔ Black Type III Hardcoat Anodized finish
- ✔ One-piece Picatinny mounting platform
- ✔ Full-length scope ring positioning flexibility
- ✔ #6-32 x 3/4" SHC mounting screws included
- ✔ T-10 installation bit included
- ✔ Made in the USA
Installation
Confirm that you have the correct CZ 457 rail and the correct handed configuration before beginning installation.
Clean the mating surfaces and mounting hardware before installing the rail.
EGW currently recommends applying a small amount of blue threadlocker to the mounting screws and tightening them to 20 in-lbs.
The required #6-32 x 3/4" SHC mounting screws and T-10 bit are included.
After installation, verify that the rail is fully seated and secure before installing and zeroing the optic.
VERIFY YOUR ZERO RANGE
A 40 MOA rail provides substantial built-in cant. Before purchasing, verify that your optic has sufficient internal adjustment to establish your desired zero. Available scope adjustment varies significantly between optic models.
Frequently Asked Questions
What rifle does this rail fit?
This rail is designed specifically for the CZ 457 rifle platform.
Does this fit the factory CZ 457 dovetail?
Yes. The mount is designed around the CZ 457's factory 11mm receiver dovetail and converts it to a full-length Picatinny mounting platform.
Will it fit a CZ 455 or CZ 452?
No. This rail is designed specifically for the CZ 457 receiver. Other CZ rimfire models use different receiver configurations and require the appropriate mount.
What does 40 MOA do?
The rail incorporates 40 MOA of cant, preserving more of the scope's internal elevation adjustment for dialing at extended distances.
Is 40 MOA better than 20 MOA?
Not necessarily. The correct amount of cant depends on your optic, zero distance, ammunition, and intended shooting distance. A 40 MOA rail is intended for shooters who need more available elevation than a 0 or 20 MOA base provides.
Can I still zero at close range with a 40 MOA rail?
That depends on your scope's internal adjustment range. Some optics have enough adjustment to establish a conventional close-range zero with a 40 MOA base, while others may not. Check your optic's available elevation before choosing this rail.
What is the rail made from?
The HD rail is machined from solid 7075-T6 aluminum.
What finish does it have?
The rail has a Black Type III Hardcoat Anodized finish.
What hardware is included?
The rail includes #6-32 x 3/4" SHC mounting screws and a T-10 installation bit.
What torque should I use?
EGW currently recommends 20 in-lbs on the rail mounting screws with a small amount of blue threadlocker.
Is this a right-hand or left-hand mount?
The mount is not ambidextrous. Select the appropriate handed configuration for your CZ 457 when ordering.
Maximum Elevation for Long-Range CZ 457 Builds
The EGW HD CZ 457 40 MOA rail combines solid 7075-T6 construction, a full-length Picatinny mounting surface, and 40 MOA of built-in elevation for shooters pushing their precision rimfire rifles to extended distances.
Warning: This product may be alloyed with trace amounts of lead and other elements which are known to the State of California to cause reproductive harm and cancer. To prevent exposure, do not alter the product by welding, grinding, or similar processes. For more information, visit www.P65Warnings.ca.gov.
