Description
The MDT XRS is what happens when a chassis stops trying to feel tactical and starts feeling like a rifle you actually want to shoulder. It's built around a full-length CNC-machined core of 6061 aircraft-grade aluminum, then wrapped in high-strength textured polymer panels. That aluminum spine is doing the heavy lifting for accuracy, while the polymer skins keep the weight down and give your hands a warmer, grippier surface than bare metal ever could on a cold morning behind the glass.
What the XRS Chassis Does for Your CZ 457
The magic here is the CZ 457-specific inlet. It's machined with a V-groove and rear recoil lug slot to bed your barreled action with a stress-free, repeatable fit, which is where the real accuracy gains come from. The barrel free-floats, so you're no longer at the mercy of a wood stock that shifts with humidity and temperature. The generous barrel channel clears everything from a slim sporter profile up to a heavy varmint contour, handling barrels up to 1.25 inches in diameter.
Dialing In the Fit
Length of pull runs from 13.25 inches out past 15 inches using the included spacers, and you can stack more if you need extra room. The quick-adjust cheekpiece gives you around 1.5 inches of vertical travel to match your cheek weld to whatever scope height you're running. Both an angled grip and a vertical grip come in the box, and swapping between them takes nothing more than backing out a couple of screws to find the hand position and trigger reach that feels right to you.
Built to Grow With You
The 12-inch forend is loaded with M-LOK slots along the sides and bottom, all kept rock-solid by that aluminum backbone. Add a bipod, hang an ARCA rail for a tripod, or bolt on a Picatinny section for a barricade stop. At roughly 3.9 pounds depending on inlet, it splits the difference nicely between a range gun and something you can carry. Installation is a genuine drop-in job that most folks finish in a couple minutes with a set of Allen wrenches, and MDT supplies the correct-length action screws to get it done. Your rifle's original magazine release lever stays in place.
Key Specifications
- Manufacturer: MDT
- Manufacturer Part Number: 105051-BLK
- UPC: 682157402236
- Model: XRS Chassis
- Fits: CZ 457 Short Action
- Action Type: Bolt Action
- Color: Black
- Finish: Matte
- Core Material: CNC-Machined 6061 Aircraft-Grade Aluminum
- Exterior Panels: High-Strength Textured Polymer
- Bedding: Precision Aluminum V-Block
- Forend: 12 inch with M-LOK slots
- Length of Pull: 13.25 to 15+ inches via spacers
- Cheekpiece: Quick-adjust, approx. 1.5 in of travel
- Max Barrel Diameter: Up to 1.25 inches
- Weight: Approx. 3.9 lbs (varies by inlet)
What’s Included
- MDT XRS Chassis (Black)
- Angled grip panel
- Vertical grip panel
- Length of pull spacer kit
- Correct-length action screws for installation
Frequently Asked Questions
Is the MDT XRS chassis a true drop-in fit for the CZ 457?
Yes. The inlet is machined specifically for the CZ 457 action with a V-groove and rear recoil lug slot, so no gunsmithing or bedding work is needed. Most people have their barreled action swapped over in a couple of minutes using standard Allen wrenches, and MDT includes the correct-length action screws to finish the job.
What magazines does the CZ 457 version of the XRS use?
The CZ 457 inlet is set up to run standard factory CZ 457 rimfire magazines, so you can keep using the mags you already have. While the broader XRS platform is AICS-compatible for centerfire actions, this rimfire-specific inlet is built around the CZ 457 feed system. That keeps things simple and reliable for your .22 LR, .17 HMR, or .22 WMR setup.
Will the XRS chassis fit a heavy varmint or bull barrel?
It will. The barrel channel is generously sized and free-floats the barrel, clearing profiles up to 1.25 inches in diameter. That covers everything from a light sporter contour to a heavy target or varmint barrel with room to spare.
Can I mount a bipod, ARCA rail, or Picatinny accessories to the XRS?
Absolutely. The 12-inch forend has M-LOK slots along the sides and bottom, all backed by the rigid aluminum core. That lets you hang a bipod directly, add an ARCA rail for tripod work, or bolt on a Picatinny section for a barricade stop and other accessories.





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