Home › Guides

Rimfire chassis and full precision builds for T1x and CZ 457: MDT, KRG, Grey Birch, XLR

Product links go to retailers and may be affiliate links; we may earn a commission at no cost to you. Prices as seen Oct 2026 and change often. Affiliate disclosure

Why put a rimfire in a chassis?

A chassis gives you a vertical grip, adjustable length of pull and cheek height, a flat or ARCA forend for barricades and tripods, and M-LOK slots for weights and accessories. It also gives consistent action bedding. It won't fix bad ammo or a poor barrel, and it adds cost and weight. In NRL22, an aftermarket stock moves the rifle out of Base and into Open ^[1].

Which chassis fit both the T1x and the CZ 457?

Prices are what the linked page showed when our data was checked (Oct 2026). Configure your exact inlet (MTR, UPR, Varmint, American, etc.) before ordering. Some chassis are inlet-specific.

Which chassis should I buy?

• First chassis or Open-division starter: ORYX or KRG Bravo. Both are proven and affordable, and both have big accessory ecosystems.
• You transport or carry the rifle and want a folder: XRS or Grey Birch La Chassis.
• Serious NRL22/PRS Rimfire: MDT ACC or XLR Element. Both take weights, have long ARCA forends and barricade stops.
• You want it to match your centerfire: pick the same family (e.g. MDT ACC on both). On a T1x you can also use Tikka T3x-pattern stocks (see T1x as a T3x trainer).

How do I install a drop-in chassis?

1. Unload and remove the magazine and bolt. Check the chamber.
2. Remove the factory action screws and lift the barreled action out. Keep the factory parts together.
3. Check the chassis for the correct inlet and that any bedding or recoil-lug parts are in place (some chassis need the factory recoil-lug insert or the chassis's own lug).
4. Set the action in, seat it rearward against the lug, start both screws by hand, then torque them alternately to the chassis maker's spec, not a forum number. Rifle torque references are on our T1x and CZ 457 gunsmithing pages.
5. Check free-float (a business card should slide under the barrel to the receiver), confirm the bolt cycles, check that the safety and trigger work, and confirm the magazine seats and releases.
6. Re-zero. A chassis swap almost always shifts point of impact.

Tools: a torque driver and Torx/Allen bits; see the gunsmithing tool lists.

How should I balance a chassis rifle?

Match shooters aim for a balance point near or just ahead of the magazine well. That keeps the rifle stable on barricades without being nose-heavy. Add weight low and forward via M-LOK or ARCA weights, and a heavier barrel or a suppressor shifts balance forward. Both rifles in a chassis with a scope typically end up in the 10–14 lb range for match use. Weigh your setup and adjust; there's no single correct number.

What else does a full precision build need?

• Scope and mount: see optics and mounting.
• Trigger: see barrel and trigger upgrades.
• Support: ARCA rail, bipod and rear bag. Examples: MDT ORYX ARCA rail, MDT M-LOK ARCA rail, MDT ORYX bipod, MDT Ckye-Pod Gen3.
• Mags: CZ 15-round or T1x 10-round.

Full parts lists with prices are in the T1x build recipes and CZ 457 build recipes.

Chassis install checklist

1. Confirm the inlet: T1x and CZ 457 chassis aren't interchangeable, and some are right-hand only.
2. Check magazine compatibility. Some chassis use factory mags; others need adapters or AICS-pattern mags.
3. Torque the action screws to the chassis maker's value, in their stated order.
4. Check barrel clearance along the full forend (a business card should slide freely).
5. Re-zero and confirm with a group after any chassis swap.

Balance and weight

Precision chassis builds often end up 9–12 lb with scope and bipod. Front-heavy setups track straighter on barricades, while rear weights help the rifle sit level on a bag. Many chassis take M-LOK or bolt-on weights, so add weight in small steps and practice positional stages before a match. Keep NRL22 divisions in mind: an aftermarket chassis puts you in Open.

Factory chassis rifles vs building your own

Several makers now sell .22s already in a chassis, which can cost less than buying a rifle plus an aftermarket chassis. Examples are the Savage B22 Precision (MDT chassis, $749 MSRP), the Ruger Precision Rimfire ($629) and CZ's own MDT XRS models. Building your own lets you pick the exact chassis, grip and barrel and keep the factory stock for resale. Buying factory gives you a warranty-covered package. Compare them here:

MSRPs from the maker where available, otherwise labeled retailer listings, checked Oct 2026. Aftermarket depth and NRL22 fit are our editorial summaries (NRL22 Base: rifle plus scope MSRP up to $1,650). Specs are published figures, not our measurements.

FAQ

What is the best chassis for a CZ 457?

For value, the MDT ORYX ($449.99) or KRG Bravo ($399.99). For matches, the MDT ACC ($699.99+) or XLR Element 4.0. For a folder, the MDT XRS or Grey Birch La Chassis.

What is the best chassis for a Tikka T1x?

The same families make T1x inlets: MDT ORYX, XRS, LSS and ACC; KRG Bravo; XLR Element 4.0; and Grey Birch La Chassis. T1x owners can also use Tikka T3x-pattern stocks.

Does a chassis move me out of NRL22 Base?

Yes. Base requires the factory stock configuration; an aftermarket chassis puts you in Open.

Is a chassis drop-in?

Generally yes. Remove the action screws, set the action in the chassis and torque to the chassis maker's spec. Re-zero afterward.

Sources

1. NRL22 2027 Rules (valid May 1, 2026 to April 30, 2027)

Confidence: maker specs and prices are high confidence as of the date seen; forum and owner reports are low–medium confidence and labeled as such.

Not affiliated with Sako/Tikka, CZ, Bergara, Ruger, Savage or any retailer. We have not tested products hands-on for these guides; figures come from cited sources. Affiliate disclosure · Privacy · Terms · Rimfire Builds is operated by Tomahawk Designs LLC, Utah · contact@rimfirebuilds.com