CZ Bren 2 Ms Carbine Review: Modern Modularity

Offering one of the slickest-running actions I’ve ever tested on a non-custom semi-auto rifle, CZ’s modular Bren 2 Ms carbine is feature-rich and incredibly soft-recoiling.

The Czech-designed Bren line dates back to 2006 and was originally meant as a replacement for the aging Cold War-era vz. 58. One of the gun’s most unique features was a clever modularity that included the ability to swap calibers between the 5.56x45mm used by NATO nations and the 7.62x39mm AK cartridge favored in the former Soviet Union’s sphere of influence.

Today, it’s also a combat-proven design, with distinguished service on battlefields ranging from the War in Afghanistan to the current Russia-Ukraine conflict. We snagged this one from the Guns.com Certified Used Vault for this review.

Here’s how it held up during our 700-round testing over the last several months.

Table of Contents

CZ Bren History
Function & Features
Specifications
Range Testing
Pros & Cons
Final Thoughts

CZ Bren History

Like many guns that emerged after the fall of the Soviet Union, the Bren family of firearms represents a post-Cold War need for modernization. While the Czech Republic had once fallen within the USSR’s sphere of influence, it began courting NATO membership after the Cold War.

That put it in a peculiar predicament. It was both surrounded by nations using the older 7.62x39mm cartridge and attempting to align itself with nations that had standardized the 5.56x45mm NATO cartridge.

CZ Bren 2 Ms Rifle — The Bren line of firearms was, in part, an answer to the Czech Republic's need to modernize after the Cold War. (Photo: Paul Peterson/Guns.com)

In the end, the newly formed Czech Republic entered the Western NATO alliance in 1999, but its new go-to military firearm kept doors open to using ammo from both the West and the East.

The Bren 2 that we have here for review is actually an updated model with roots that go back to the original CZ Bren 805, created in 2006. The Bren design accomplished several goals of the Czech Republic when it came to post-war military rifles.

The Bren 805 offered a short-stroke gas-piston system that could compete with other modern designs like the FN SCAR, but it also came with a ton of modularity that made it easy to customize for various uses.

On top of being modular for ammo with just a simple change of the barrel, bolt, and magazine well, it came with modern ergonomics and plenty of adaptability for accessories. On that note, let’s take a closer look at this Bren 2 Ms to explore all its special features.

Function & Features

CZ Bren 2 Ms Rifle Parts — The gun is very easy to take apart and clean, with just a handful of parts. (Photo: Paul Peterson/Guns.com)

Introduced in 2019, the CZ Bren 2 Ms is a commercialized semi-auto variant chambered for .223 Rem, essentially the commercial version of 5.56mm NATO. It uses a short-stroke gas piston with a non-reciprocating charging handle and a gas-adjustment regulator near the front of the barrel.

It features a hard-chrome-lined barrel with a guaranteed service life of 20,000 rounds. The receiver is built from 7075 aircraft-grade aluminum alloy, and the trigger-guard housing, pistol grip with adjustable backstraps, and shoulder stock are all made from fiberglass-reinforced polymer.

PPeterson, CZ Bren 2 Ms, Bren 2, Bren II, Bren 2 Ms, 5.56mm NATO, .223 Rem, Tactical Rifle, Rifle, CZ, Česká Zbrojovka, Bren, Black Rifle, Bren 2MS, Bren 2M, — The rotating bolt and carrier group are robust, and the bolt head should seem familiar to anyone who has seen an AR-15 bolt. (Photo: Paul Peterson/Guns.com)

Gas Piston — The short-stroke gas piston is a key feature that helps the gun run with low felt recoil. Adjusting it also allows you to continue shooting even when the gun is excessively dirty. (Image: CZ)

The AR-style controls are ambidextrous, and users can swap the charging handle to the right or left side of the receiver. The fiberglass-reinforced polymer folding stock is adjustable for length of pull and has a raised comb for an improved cheek weld. The butt pad is a surprisingly comfy but firm rubberized material with triangular waffling.

Even the forend is modular and can be had in various configurations. This one sports a full-length of Picatinny rail running over the handguard, which also has plenty of M-LOK for lights, lasers, sling mounts, grips, etc.

Specifications

Here’s a quick breakdown of the specs for this CZ Bren 2 Ms:

Weight: 6.37 pounds
Length: 28.3 inches (folded), 35.7-38.5 inches (stock extended)
Barrel Length: 16.5 inches
Barrel Twist: 1:7
Caliber: .223 Rem
Magazine Type: AR-pattern STANAG magazines
Capacity: 30+1 with standard magazines
Receiver Material: 7075 T6 aluminum alloy
Barrel Material: Cold-hammer-forged, hard-chrome-lined steel
Barrel Threads: 1/2x28 TPI
Gas Settings: Three (1= normal, 2 = adverse, and zero/closed = manual cycling)
Trigger Pull: 4.19 pounds (listed as 3.5 ± 0.89 pounds)
Trigger Type: Two-stage trigger

Range Testing

EOTech Vudu Scope — The EOTech Vudu is a fantastic optic for this platform. The 3-9x magnification allows it to do close and mid-range work very well. (Photo: Paul Peterson/Guns.com)

The felt recoil on this gun is almost comically light. Even firing as fast as I can, the gun just gently rocks as it plows through full 30-, 40-, and 60-round mags filled with brass-cased ammo.

Even with a magnified optic and a 30-round magazine, the weight of this gun seems feather-light. The center of gravity is right in front of the magazine well when loaded, which makes it very quick and nimble when transitioning between targets.

That low recoil and all the refined features of the Bren 2 Ms showed in the accuracy department. Using a new EOTech Vudu 3-9x32 scope, here’s what I got for my accuracy testing.

CZ Bren 2 Ms Rifle Target — These four groups were all shot on the same target at 50 yards. The top left shows my first zero shots with a small adjustment to bring it to center. The Vudu’s center dot is big enough to cover most of the 1-inch center circle. The top right shows three shots effectively cutting a single hole. The bottom left had one small flier but still was under 1 inch in diameter. The same was true for the bottom right. (Photo: Paul Peterson/Guns.com)

EOTech Vudu Reticle — This is what the EOTech Vudu reticle looks like at 20 yards at 3x and 9x. The optic is a fantastic piece of gear, but at 50 yards, that center dot is big enough to cover the center red dot on the target, which likely explains a good part of the small spread we saw in the above groups. (Photo: Paul Peterson/Guns.com)

Even doubling the size of the groups above for a 100-yard zero, we’re still looking at plenty of accuracy potential for a modern sporting rifle. With a bit more precision practice, I’m quite confident we could get all those groups pulled in tighter to look more like that single-hole group in the top right.

Now, for the reliability. From everything I’ve heard, other users find the Bren 2 rifles to be absolute tanks. We’ve even heard from the folks at Machine Gun Vegas that the Brens were hands-down top-tier performers even after 10,000+ rounds on their range.

Since there’s an adjustable gas system to handle even adverse conditions and a dirty action, that doesn’t surprise me at all.

I put 700 rounds through this gun. That included 200 rounds of brass-cased 55-grain PMC Bronze and 200 rounds of brass-cased 55-grain Federal American Eagle. I also ran 100 rounds of brass-cased 62-grain Federal American Eagle. Lastly, for the brass-cased ammo, I ran 60 rounds of 62-grain Winchester M855 ball for an accuracy test.

I had zero issues or malfunctions with that brass-cased ammo when using standard 30-round metal STANAG magazines, Magpul PMAGs, and ETS clear polymer mags. The same was true for a mag dump with my 60-round Schmeisser mag.

However, I had a handful of issues when testing 140 rounds of steel-cased 55-grain Tula .223 Rem ammo. I had five separate failures to strip and fully chamber the round when using a steel STANAG magazine. Given all the other testing, I suspect that this may just have been an ammo-specific or magazine-specific issue, possibly both. I also could not get the issue to repeat itself with polymer magazines.

All in all, the gun ran like an absolute beast, and it’s a pure joy to shoot. It’s flat, fast, and fun. Just make sure you give your ammo and magazines a test drive.

Pros & Cons

Here’s my short list of the biggest pros and cons for the CZ Bren 2 Ms:

Pros:

Excellent recoil control
Adjustable short-stroke gas-piston system
Modular and ambidextrous features
Quality build material and workmanship
Fast and flat shooting
Good two-stage trigger pull at just 4.19 pounds
Uses standard STANAG-pattern magazines
Reliable
Accurate
Tons of space for accessories
Lightweight and nimble in the hand
Easy to disassemble and clean

Cons:

Higher price tag
We had a few issues with some steel-cased ammo
Trigger is a bit mushy for the price

Final Thoughts

I struggled to find things I don’t like about this gun. Outside of the few failures to feed on steel-cased ammo, the Bren 2 Ms was a fantastic performer. It’s not a precision rifle, but it can get accurate work done even in harsh conditions.

The ambi controls, adjustable gas system, low felt recoil, use of standard STANAG-pattern magazines, and easy disassembly make it the most user-friendly rifle in my safe at the moment. My biggest issue is the cost, but that comes down to the quality of the gun itself. You do have to pay for that quality, but the Bren 2 Ms pays it forward with performance.

If you’ve spent most of your time shooting common AR-15s or AK-style rifles on the range, you’re in for a surprising treat when you finally pull the trigger on CZ’s Bren 2 Ms.