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Reader Survey >CZ 457 MDT ACC Review: A Precision Rimfire Competition Contender
- By Chris Parkin
- Last updated: 13/08/2025
I’ve reviewed nearly every rifle in the CZ 457 family, and the platform has become a true keystone in the rimfire market. The core action remains consistent, while barrel options, stock configurations, and modularity offer precision-tailored setups for nearly any application. In many ways, the 457 offers specification choices previously only available in custom builds.
So, what has CZ done now? They have partnered with MDT to offer a factory rifle fitted with the popular MDT ACC chassis, an out-of-the-box solution designed specifically for precision rifle competitions. This is a premium component, considerably more expensive than those found on other factory CZ models, and it makes the new rifle nearly twice the price of the 457 LRP (Long Range Precision), which also features a match chamber and a fluted heavy barrel. MDT’s branding and design clearly command a premium, both in name and in performance, thanks to their established pedigree in worldwide PRS competition.
The rifle features a 24” (610mm) cold hammer-forged barrel, threaded ½”x20 for muzzle devices. It’s a straight 22.2mm parallel contour, ensuring excellent heat stability and rigidity. As with other 457s, the action remains the same: a steel bolt with a single rear locking lug, dual extractor claws, and a manual ejector that allows brass to be flung as hard and fast as bolt manipulation dictates.
The barrel is clamped into the action with two machine screws and is technically interchangeable, though spare barrels aren’t commonly available retail. The action accepts both .22LR and (on appropriate models) .17HMR, thanks to CZ’s single-length action design, but we are looking at this specific model today.
The bolt handle is a 20mm steel ball, overlaid by a 33mm multi-faceted rubber sphere that enhances grip and ergonomics. Just like every 457 I have used, the bolt throw is quick and ultra-smooth, reflecting the input of skilled shooters, designers, and engineers using modern methods to maximise performance, rather than cost-cutting marketers calling the shots. Control is fingertip light, and the ammo feeds cleanly from the magazine, but you will notice the slightly tighter feel of the action due to the match chamber/headspace, which will soon become part of the gun’s personality.
The trigger is a single-stage unit, adjustable for both pull weight and sear engagement. It’s crisp out of the box and can be tuned or serviced over time to eliminate creep that may develop, as, like any material, steel will still wear over its life. The smooth, mid-curve trigger blade sits inside a generous guard that’s integrated into the chassis.
A 10-round CZ magazine is included, though it does feel a little lost in the oversized chassis magwell. Function is flawless, but a tighter magwell could improve reload ergonomics, and since it is a specific inlet for the 457 requiring a unique CNC programme, I’m surprised they didn’t trim a little from the oversized generic edges. Cost will always get in the way in the end.
A standard dovetail is machined into the top of the receiver, but CZ wisely includes a 25 MOA Picatinny rail. It extends 30mm forward, allowing large optics to be mounted while preserving correct eye relief on an inherently compact rimfire action.
MDT’s ACC chassis is already well-known in precision shooting circles, and its implementation here feels seamless. The fore-end is 430mm long, with a 44mm-wide U-profile and 37mm depth. The walls are 3.6mm thick, ensuring immense rigidity. The barrel is fully free-floated, and an integrated ARCA rail runs along the underside, with M-LOK slots extending all the way back to the aggressively serrated barricade stop’s 35mm square face. Side-mounted M-LOK points offer further accessory options.
An AR-style vertical grip is included, which is boxy and hand-filling at 110mm tall, with a 40–44mm cross-section. Its position is adjustable, allowing for 9mm of reach adjustment to fine-tune trigger control.
Moving rearward, the buttstock features a rigid skeleton frame. The adjustable cheekpiece offers 40mm of vertical travel via a knurled dial, with twin locking screws and return-to-zero position markings. The comb is half-hexagonal in shape, providing cheek support without forcing lateral jaw displacement. There’s 10mm of lateral travel as well, so perfect eye-to-optic alignment is easily achieved quickly, every time.
The length of pull (LOP) is adjustable over a 30mm range. The recoil pad is firm, slightly concave, and vertically adjustable. At full extension, LOP measures 370mm (14.5”), shortening to 340mm when collapsed. QD sling mounts are located on both sides of the hand stop, which doubles as a bag rider (23mm wide).
The entire chassis is anodised in a deep matte black with a flawless finish. Every edge is chamfered to avoid snags, and the laser-etched markings are crisp and clear.
For testing, I added a Schmidt & Bender 6-36x56 High Performance scope in Tier One rings, and a Tier One wide-stance bipod mounted via the ARCA rail.
One reason I love using rimfires is their low noise level, which makes them ideal for extended sessions without disturbing the neighbours. I was initially curious about how the 24” barrel would affect velocity – would it push standard ammunition into the supersonic range compared with shorter 16” or 20” barrels?
Using SK Standard ammo, I recorded an average velocity of 1,065fps, with an extreme spread (ES) of 24fps and a standard deviation (SD) of 8.8fps over 10 shots. RWS Match clocked in slightly faster at 1,085fps, but with a wider ES of 40fps and SD of 11.6fps. Wind was a more critical factor than velocity at 100m, but consistency remains king when you push the range further.
The best 10-shot group measured just 16.8mm with SK ammo, and all groups were comfortably sub-MOA when I could avoid the wind. RWS Match was really no worse overall on paper, but I suppose the chronograph results swayed me toward the SK, and if I were competing, I would no doubt test in greater depth.
Fitted with a SAK moderator, the rifle makes a unique, almost charming “ting” sound, which is caused by the firing pin’s impact resonating through the rigid chassis. Additional fore-end weights (available from MDT) would likely dampen this, but I found it endearing and quite characterful. You could achieve the same sound with just a flick of your finger on the aluminium fore-end, so it’s clearly the CZ’s harmonic frequency.
All controls are intuitive and tactile. Bolt throw is 42mm, with an approximate 60° lift, meaning it’s fast, light, and non-disruptive to your aimpoint.
The rifle weighs 4.7kg bare and about 6.5kg scoped and ready to shoot. It’s heavy, yes, but that’s ideal for this rifle’s purpose: prone and positional stability in competition scenarios.
On barricades, the balance is exactly at the barricade stop, and with roughly 1.2kg of scope and mount over the centre, the gun is planted. Some may prefer to add weights for further tuning, but it shoots well straight from the box. The barrel is not as heavy as some custom rifles, but I personally like to feel a bit of feedback from the gun, not just a dead weight.
Though it’s not necessarily the rifle I’d buy for my own use, because I’m not a PRS guy, I can’t help but admire how beautifully it shoots and handles. Magazine feed is smooth, and I found no damage on the bullet meplats. Ejection is reliable at any speed.
CZ magazines are affordable and widely available, and beyond this rifle, you are entering high-end territory with guns from companies such as Vudoo or Masterpiece Arms. While these may offer slightly crisper triggers, smoother bolt throws, and heavier barrels, the CZ holds its own in real-world wind handling and practical usability, where personal preference – and, dare I say, ego – becomes a major factor.
“If precision rimfire competition is your goal, the CZ 457 MDT ACC is well worth a look”
If precision rimfire competition is your goal, the CZ 457 MDT ACC is well worth a look. It’s a very different animal from the rest of the 457 range, being more refined, more specialised, and impressively capable. It is expensive, and some may say it’s only a standard 457 action, which is true, but the action is good, with comfortable handling.
I can’t argue that ultimate PRS shooters want that cast iron rifle weight and dead recoil feeling (and you can still perceive a tiny amount in most heavy rifles), but for those dipping a toe in the water and wanting something of a halfway step, maybe the CZ is the perfect choice between the handling dynamics of a varmint rifle and the full-blown precision of a competition gun. I want to investigate further.
MDT ACC Chassis:
