The Second Hand Firearm - BRNO Model 2 Bolt Action Rimfire Rifle .22 LR is a classic Czechoslovakian sporting rifle built around the renowned ZKM 452 action. Developed during the 1950s as a refinement of the earlier BRNO Model 1, the Model 2 established the mechanical architecture that would later continue through the CZ 452 family. Chambered in .22 Long Rifle, it combines a forged-steel bolt-action receiver, detachable magazine system, adjustable trigger and traditional rimfire sporting-rifle proportions in one of BRNO's most enduring small-calibre designs.

The Model 2 earned a strong reputation for straightforward engineering and durable construction. Its action uses a conventional manually operated bolt with twin locking surfaces, while the carbon-steel barrel is threaded directly into the receiver on traditional .22 LR examples. The design was intended as a practical sporting and training rifle rather than a lightweight economy rimfire, resulting in a substantial receiver, full-length barrel and robust magazine system that remained broadly compatible with later CZ rimfire rifles.

BRNO Model 2 .22 LR Key Features

• ZKM 452 Action: The BRNO Model 2 is commonly identified by the ZKM 452 designation and forms the mechanical foundation of the later CZ 452 series. The ZKM name refers to Zbrojovka, designer Josef Koucký and the Czech term for small-calibre rifle.
• .22 Long Rifle Chambering: Best known in .22 LR, the Model 2 was designed as a magazine-fed rimfire sporting rifle suitable for recreational target shooting and small-game applications where legally permitted.
• Bolt Action Repeater: Uses a manually operated bolt-action system with a compact receiver and conventional rimfire locking arrangement, providing a simple and mechanically robust repeating-rifle design.
• Threaded-In Carbon-Steel Barrel: Traditional Model 2 rifles use a carbon-steel barrel threaded directly into the receiver, providing a rigid barrel-to-action interface characteristic of the platform. 
• Detachable Box Magazine: The standard configuration uses a removable box magazine. Five-round magazines were commonly supplied, with higher-capacity compatible magazines also produced for the broader ZKM 452 / CZ 452 family.
• Long-Running Magazine Architecture: One of the practical strengths of the Model 2 design is the continuity of its magazine system. The basic magazine pattern remained largely unchanged through later CZ rimfire generations, giving the design unusually long component continuity.
• Adjustable Trigger: The Model 2 uses an adjustable sporting trigger system, allowing the trigger mechanism to be set within the manufacturer's intended adjustment range.
• Tangent Rear Sight: Traditional Model 2 rifles were equipped with a military-influenced tangent rear sight, typically graduated out to 200 metres, paired with a conventional front sight for iron-sight use.
• Optic-Mounting Provision: The receiver design incorporates a dovetail mounting interface on many Model 2 / ZKM 452 rifles, allowing compatible rimfire optic mounts to be fitted without requiring a separate receiver rail.
• Traditional Sporting Stock: The Model 2 was generally supplied with a conventional timber sporting stock, most commonly beech with some walnut-stocked variations produced.
• Czechoslovakian Manufacture: Produced as part of BRNO and Česká Zbrojovka's long-running rimfire rifle program, the Model 2 became closely associated with Czech sporting-rifle manufacture.
• Predecessor To The CZ 452: The basic Model 2 architecture was retained and progressively developed into what became known internationally as the CZ 452, giving the original BRNO design an unusually long production legacy.

Specifications

• Brand: BRNO
• Model: Model 2 / ZKM 452
• Product Type: Bolt action rimfire rifle
• Condition: Second hand / pre-owned
• Calibre: .22 LR / .22 Long Rifle
• Action: Bolt action
• Feed System: Detachable box magazine
• Standard Magazine Capacity: 5 rounds
• Barrel Material: Carbon steel
• Barrel Attachment: Threaded into receiver on traditional .22 LR Model 2 rifles
• Trigger: Adjustable sporting trigger
• Sights: Traditional front sight and tangent rear sight
• Receiver: Steel
• Optic Mounting: Integral rimfire dovetail on applicable Model 2 / ZKM 452 receivers
• Stock: Traditional timber sporting stock
• Origin: Czechoslovakia
• Best Use: Recreational range shooting, sporting use, collection and small-game hunting where legally permitted

BRNO Model 2 / ZKM 452 Action

The mechanical significance of the BRNO Model 2 lies in the ZKM 452 action. Developed from the earlier ZKM 451 / Model 1, the Model 2 refined the concept into a magazine-fed sporting rifle with an adjustable trigger, detachable magazine and a more developed receiver and sighting arrangement. Its combination of a threaded barrel, substantial steel receiver and uncomplicated bolt mechanism helped establish the design as one of BRNO's most recognisable rimfire platforms.

The longevity of the design is particularly notable. Although branding and individual specifications evolved over time, the underlying Model 2 architecture continued into the CZ 452 family, retaining many of the same fundamental mechanical concepts and even broad magazine compatibility. That continuity is a major reason the Model 2 remains familiar to shooters and collectors decades after its introduction.

Second Hand Firearm

As a pre-owned rifle, this BRNO Model 2 .22 LR should be assessed as an individual firearm. Mechanical condition, bore condition, magazine condition, trigger operation, serial markings, year of manufacture and the specification of any fitted optic or accessories should be confirmed through the licensed dealer before purchase. Model 2 rifles were manufactured across a long period, so individual examples can differ in stock style, sights, receiver markings and other production details.

The Second Hand Firearm - BRNO Model 2 Bolt Action Rimfire Rifle .22 LR represents one of the best-known Czechoslovakian rimfire sporting designs. Its ZKM 452 action, threaded carbon-steel barrel, adjustable trigger, detachable magazine and traditional sporting configuration created a platform with enough longevity to evolve directly into the later CZ 452 family, making the Model 2 an important rifle in BRNO and CZ rimfire history.