457 anatomy: what you can swap

Every major component, what can be replaced, what with, difficulty and cost range from our parts database (as of Oct 2026). Facts come from the 457 specs and part pages linked throughout.

Schematic drawing (not to scale, not a photo). Click a block to jump to its section.

At a glance

Component by component

Stock / chassis

• Swappable? Yes — interchangeable across 457s (CZ-USA)
• Why: Fit, rigidity, bipod/ARCA mounting
• Difficulty: DIY · Cost range in our data: $217–$1,025 (17 options)
• Options: KRG Bravo Chassis Rimfire - CZ-457 inlet, MDT ORYX Chassis System - CZ 457, MDT XRS Chassis System - CZ 457 (also CZ 455, MDT LSS Gen3 Chassis Base / kits - CZ 457
• Caveats: 455 stocks don't fit; check barrel channel for heavy barrels; check screw length.

Action / receiver

• Swappable? No (serialized)
• Why: —
• Difficulty: Smith/FFL · Cost range in our data: n/a (0 options)
• Options: no aftermarket option in our data
• Caveats: The receiver is the regulated firearm in the US.

Bolt, handle & knob

• Swappable? Yes
• Why: Larger knob, smoother cycling
• Difficulty: DIY · Cost range in our data: $25–$45 (4 options)
• Options: Area 419 Bolt knob (M6x1 thread), CZ (OEM) 457 bolt handle (RH $45) / LH bolt handl, cz-parts.com (EU) Bolt knobs (Hyperion, Acorn, wooden, ste, Triggershims.com (via Kurt the Gunsmith) CZ 457 bolt headspace shims
• Caveats: Bolt knob thread M6x1 (Area 419 listing).

Firing pin / spring

• Swappable? Limited
• Why: Lighter strikers only with matched triggers (e.g. Flyweight kit)
• Difficulty: Smith · Cost range in our data: n/a (0 options)
• Options: no aftermarket option in our data
• Caveats: Flyweight trigger must use its included striker (CZ manual).

Extractor

• Swappable? Factory part only
• Why: Replace if worn
• Difficulty: Smith · Cost range in our data: n/a (0 options)
• Options: no aftermarket option in our data
• Caveats: Use CZ parts.

Trigger & springs

• Swappable? Yes — 457-specific
• Why: Lighter, crisper
• Difficulty: DIY (careful) · Cost range in our data: $20–$448 (6 options)
• Options: Timney CZ 457 trigger (CZ457 curved / CZ457-ST , JARD Trigger System for CZ 457 (PN CZ457), CZ (OEM) CZ 457 Flyweight Trigger (two-stage + ma, CZ (OEM) Trigger assembly set 457 (standard 8-15
• Caveats: 455 triggers don't fit; TriggerTech makes none; factory range 8–15 N.

Safety

• Swappable? Only as part of a trigger
• Why: —
• Difficulty: — · Cost range in our data: n/a (0 options)
• Options: no aftermarket option in our data
• Caveats: Never modify separately.

Bottom metal / trigger guard

• Swappable? Yes
• Why: Metal guard, barricade stop
• Difficulty: DIY · Cost range in our data: $101–$130 (3 options)
• Options: Anarchy Outdoors CZ 457 Bottom Metal (7075, optional barr, L3i Rifles CZ 457 .22 LR billet bottom metal & guar, CZ (OEM via cz-parts.com) CZ 457 duralumin trigger guard
• Caveats: Must suit the stock inlet.

Magazine & release

• Swappable? Yes
• Why: Capacity (5/10/15)
• Difficulty: DIY · Cost range in our data: $5–$136 (14 options)
• Options: CZ (OEM) 5-rd polymer .22 LR (fits 452/453/455/45, CZ (OEM) 10-rd polymer .22 LR, CZ (OEM) 15-rd polymer .22 LR, CZ (OEM via cz-parts.com) 25-rd polymer .22 LR
• Caveats: Factory CZ mags are caliber-specific.

Barrel

• Swappable? Yes — designed to swap (set screws + headspace)
• Why: Caliber change, heavier/custom barrel
• Difficulty: DIY with care / smith · Cost range in our data: $179–$600 (12 options)
• Options: CZ (OEM) 457 Varmint barrel set 20in nitride (.22, CZ (OEM) 457 American barrel set 24in (00300/0030, CZ (OEM) 457 Lux barrel set 24in (sights) 00305-0, CZ (OEM) 457 American SR 20in (00311-00313) & Var
• Caveats: Check headspace per maker; prefits vary; 455 barrels need care.

Muzzle / thread

• Swappable? Yes
• Why: Protection, suppressor host
• Difficulty: DIY · Cost range in our data: $56 (2 options)
• Options: Any 1/2x28 rimfire suppressor / thread prote, CZ (OEM via cz-parts.com) CZ 457 compensator - Varmint / American
• Caveats: US 1/2-28; EU/UK 1/2-20 UNF on many.

Scope base / rail & rings

• Swappable? Yes
• Why: Picatinny or 11 mm rings
• Difficulty: DIY · Cost range in our data: $38–$189 (8 options)
• Options: EGW HD CZ 457 one-piece Picatinny rail (8093, Area 419 CZ457 Scope Base (clamp-on, 15/30/50 MOA, MDT Picatinny scope base - CZ 457 (20/30/40/, Talley CZ rimfire steel rings, 11 mm dovetail (
• Caveats: 455 rails don't fit the 457; rail with recoil stop if rings slip.

Bedding / fasteners

• Swappable? Yes
• Why: Pillars, screws
• Difficulty: DIY · Cost range in our data: $4–$9 (2 options)
• Options: CZ (OEM) 457 stock insert 'recoil lug' / front & , XLR Industries Action screws - Rimfire (CZ-457 & Anschu
• Caveats: Manual: 3.5 Nm (~31 in-lb). CZ-USA FAQ: 25 in-lb wood stocks, 35 in-lb Varmint Precision Trainer and chassis models.

Action screws

• Swappable? Yes
• Why: Hardened / correct length
• Difficulty: DIY · Cost range in our data: $4–$9 (2 options)
• Options: CZ (OEM) 457 stock insert 'recoil lug' / front & , XLR Industries Action screws - Rimfire (CZ-457 & Anschu
• Caveats: Too-long screws can bottom out — check after any stock swap (owner reports).

Sling studs / ARCA / accessories

• Swappable? Yes
• Why: Mounting
• Difficulty: DIY · Cost range in our data: $95 (2 options)
• Options: XLR Industries Element 3 & 4 forend brass weight kit (C, MDT / KRG Universal: MDT Oryx bipod ($99.99), Ckye
• Caveats: Check stock fit.

Butt pad / LOP / cheek riser

• Swappable? Via stock/chassis
• Why: Fit
• Difficulty: DIY · Cost range in our data: n/a (0 options)
• Options: no aftermarket option in our data
• Caveats: Most chassis include LOP spacers.