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SHOP NOWClassic Firearms visits CZ in the Czech Republic to compare the Bren 2 and the new Bren 3. They examine design changes, calibers, modularity, and live-fire performance.
The video opens in the Czech Republic with a Classic Firearms host joined by a CZ representative to discuss two prominent CZ rifles: the established CZ Bren 2 and the new CZ Bren 3. The Bren 2 is described as a proven short-stroke piston system used by several militaries, including Ukrainian and Czech forces, with strong performance in harsh conditions. The Bren 3 is introduced as the latest evolution of the platform. The goal of the segment is to explain why CZ developed the Bren 3, what has changed compared to the Bren 2, and how those changes affect handling and performance before moving on to live-fire comparisons on the range.
CZ’s representative explains that the rifles shown are military variants, which differ internally from civilian versions. The Bren 2 is a short-stroke piston rifle with an aluminum monoblock chassis, where the forend and receiver are one piece. The stock and lower receiver are made from carbon-reinforced polymer for strength and reduced weight. The Bren 2 is offered in two main calibers: 5.56 and 7.62x39. The platform was designed around a multi-caliber concept, allowing a rifle in 5.56 to be converted to 7.62x39 by changing the bolt head, barrel, and a few additional parts. The design focus was durability under extreme conditions, which has been validated by field use and positive feedback from units in Ukraine.
Despite the Bren 2’s strong track record, CZ sought to respond to evolving trends and user feedback from the Czech military and other units. The Bren 2’s extensive fixed rail sections and lack of M-LOK were identified as limitations. CZ wanted to further improve reliability and usability, leading to the development of the Bren 3. The new rifle builds on the Bren 2’s strengths while adding a new layer of features. The focus is on making the platform more modular, easier to configure, and more in line with current expectations for accessory mounting and ergonomics, without compromising the core operating system that has already proven effective in service.
On the Bren 3, the forend is no longer monolithic with the receiver. Instead, the handguard is separate, allowing users to change barrel length, barrel profile, and the forend itself while keeping the same receiver. By removing the handguard and accessing screws underneath, the entire barrel and gas piston assembly can be swapped. The lower receiver remains the same as on the Bren 2, preserving familiar controls and trigger characteristics. CZ also unified the rear of the receiver so different stock types, including collapsible options, can be used. New screws on the sides indicate internal steel reinforcement, increasing durability over high round counts. The stock design, borrowed from the Bren 2 BR, offers an improved cheek piece, an additional length position, and revised attachment points so full disassembly no longer requires removing the stock from the receiver.
The Bren 3 retains the short-stroke piston system but introduces a revised gas adjustment scheme. Earlier designs used three positions: standard, closed, and an adverse setting for difficult conditions. On the Bren 3, the closed position is removed, and the settings are now standard, minus one, and plus one. This allows finer tuning of gas flow for different conditions and setups, providing less or more gas as needed while avoiding a fully blocked position that would turn the rifle into a manually cycled gun. In terms of calibers, CZ continues to support 5.56 as the primary cartridge for military users and adds a 300 Blackout version. Converting from 5.56 to 300 Blackout requires fewer parts than the earlier 5.56 to 7.62x39 conversion, as the bolt and magazines remain the same and only the barrel and gas system assembly need to be swapped.
The discussion turns to when the Bren 3 might reach the United States in a civilian configuration. The rifles shown are military models, and CZ must redesign internal components to comply with legal requirements for semi-automatic civilian versions. Specifically, the internal parts of the civilian lower must differ from the military lower so they cannot be interchanged to create a rifle capable of automatic fire. This redesign process takes time, and no firm release date is provided. The host notes that the Bren 2 is already available, and the expectation is that a Bren 3 variant will eventually follow once the necessary engineering and compliance work is completed.
On the range, the host first shoots the CZ Bren 2 in semi-automatic mode and reports smooth, reliable function after extensive use with no malfunctions. Switching to the Bren 3 with a longer barrel, the host immediately notices a softer recoil impulse, attributing it to the increased barrel length. Both rifles feel solid and “healthy” in operation, with no major difference in basic shootability. However, the Bren 3’s M-LOK forend stands out as a practical improvement. It offers more usable real estate for mounting accessories such as lights and lasers, even on shorter barrels, and provides multiple sling attachment points positioned to stay out of the way. The overall ergonomics feel familiar to users of common AR-style platforms while maintaining the Bren’s distinct operating system.
In the final segment, CZ’s representative outlines internal changes to the Bren 3’s bolt system. While the general layout and controls remain similar to the Bren 2, the Bren 3 adds a second ejector to ensure spent cases are ejected with greater and more consistent energy, further enhancing reliability. The military version also incorporates an anti-bounce system that uses different weights and springs to prevent bolt bounce during cycling. These refinements are intended to keep the action running consistently under demanding conditions. Since the trigger group and user controls are essentially unchanged, the overall feel of the rifle remains familiar, with only subtle differences in behavior compared to the Bren 2, primarily due to the updated internals and gas system tuning.
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