Barrett MRAD Mk 22 ASR: Specs, Features & Performance

A precision rifle built around three different calibers sounds like a contradiction at first. Usually, choosing a cartridge means accepting a particular set of trade-offs. The Barrett MRAD Mk 22 takes a different approach: instead of forcing the rifle into one role, its architecture is designed to adapt to changing requirements.

That idea sits at the heart of the Mk 22. Developed from Barrett’s MRAD platform, the military-configured rifle combines a bolt-action design with interchangeable caliber capability for 7.62×51mm NATO, .300 Norma Magnum, and .338 Norma Magnum.

Barrett lists the system as a USSOCOM Advanced Sniper Rifle and U.S. Army Precision Sniper Rifle contract winner, while its current specifications show barrel lengths ranging from 20 to 27 inches and weights from 13.9 to 15.2 pounds, depending on caliber.

That makes the Barrett Mk 22 interesting for more than its raw numbers. Think of it less like three separate rifles and more like a precision platform with different personalities.

The 7.62×51mm configuration is the more compact option, while the .300 and .338 Norma Magnum versions are built around longer-range requirements.

And the story is still developing. In June 2026, Barrett announced that it was testing a 6.8×51mm conversion kit for the in-service Mk 22, potentially expanding the platform beyond its established three-caliber configuration.

So, what makes the Barrett MRAD Mk 22 different from conventional precision rifles? The answer starts with its modular design, and that is where the specifications become much more interesting.

What Is the Barretts MRAD Mk 22 ASR?

The Barrett MRAD Mk 22 ASR is a military-configured, bolt-action precision rifle built around Barrett’s Multi-Role Adaptive Design (MRAD) platform. Its defining idea is simple but significant: one rifle chassis can support different cartridge configurations instead of locking the user into a single caliber.

The Mk 22 is currently configured around three cartridges: 7.62×51mm NATO, .300 Norma Magnum, and .338 Norma Magnum. Barrett lists all three as user-changeable configurations, with a 20-inch barrel for 7.62×51mm, a 26-inch barrel for .300 Norma Magnum, and a 27-inch barrel for .338 Norma Magnum. Each configuration uses a 10-round magazine.

That modularity is what separates the Barrett MRAD Mk 22 from a conventional precision rifle. The platform isn’t simply offered in several calibers as separate models.

Instead, the Mk 22 was engineered around interchangeable components, allowing the same basic rifle architecture to accommodate different mission requirements.

Barrett MRAD vs. Mk 22

It’s also important not to treat “MRAD” and “Mk 22” as interchangeable names. The MRAD is the broader modular rifle platform, while the Mk 22 is the military-specific configuration selected for the USSOCOM Advanced Sniper Rifle and U.S. Army Precision Sniper Rifle programs. Barrett’s own comparison chart lists the Mk 22 separately from the commercial MRAD and MRAD SMR.

The Mk 22 also incorporates several features aimed at military use, including a folding stock, adjustable length of pull, adjustable cheek piece, M-LOK attachment points, and a 10 MIL optic rail.

In other words, the Mk 22 isn’t merely a powerful rifle with multiple chamberings. Its real story is adaptability.

Read also: 5 Best Sniper Rifles in the World Ranked by Performance

Barrett MRAD Mk 22 ASR Specifications

The Barrett MRAD Mk 22 ASR is easier to understand when its numbers are viewed side by side. The rifle is not one fixed configuration with a single barrel length or weight; its dimensions change depending on which of the three supported calibers is installed.

Barrett’s current specifications list the Mk 22 as a bolt-action repeater with a 10-round magazine and a 21.75-inch rail carrying a 10 MIL elevation specification. The three configurations use different barrel lengths: 20 inches for 7.62×51mm NATO, 26 inches for .300 Norma Magnum, and 27 inches for .338 Norma Magnum.

There is an interesting detail hiding in that table: .300 Norma Magnum and .338 Norma Magnum configurations weigh the same on Barrett’s current specification sheet, despite using different barrel lengths. The 7.62×51mm version, meanwhile, is 1.3 pounds lighter and more than seven inches shorter than the .338 configuration.

That difference matters because the Mk 22 isn’t designed around a single “best” setup. Its specifications reflect a trade-off between portability and the capabilities associated with each cartridge.

Barrett also lists sub-MOA performance for the platform, while emphasizing its modular architecture and mission adaptability.

In other words, the specification sheet tells only half the story. The more revealing question is what all those components, especially the modular chassis, barrel system, stock, and caliber options, actually bring to the rifle.

Key Features of the Barrett MRAD Mk 22

The most interesting part of the Barrett MRAD Mk 22 isn’t its size or even its three chamberings. It is how the individual pieces work together as a single system. Barrett designed the Mk 22 around modularity, so the rifle can be adapted rather than treated as a fixed configuration.

A Modular Rifle at Its Core

The Mk 22 uses user-changeable caliber configurations for 7.62×51mm NATO, .300 Norma Magnum, and .338 Norma Magnum. Barrett describes the system as a multi-caliber bolt-action rifle intended to provide flexibility across different mission requirements. 

That matters from a logistics perspective, too. Instead of thinking of three calibers as three unrelated rifles, the MRAD architecture provides a common platform around which different configurations can be built. It’s a bit like having one vehicle with interchangeable powertrains rather than maintaining three completely different vehicles.

Folding and Adjustable Stock

The aluminum chassis incorporates a folding stock with adjustable length of pull and cheek piece. Barrett says the stock folds to the right, keeping the folded package relatively narrow while also protecting the bolt handle. The length-of-pull adjustment is operated through a button on the stock.

The cheek piece is adjustable as well, helping accommodate different users and optic setups. For a precision rifle, that isn’t merely cosmetic, the goal is consistent positioning behind the optic.

M-LOK and Optics Interface

The Mk 22 also uses M-LOK attachment points and a 10 MIL optic rail, giving users a standardized way to configure accessories and aiming equipment. Barrett describes the rifle as a complete long-range system rather than simply a barreled action.

There is another clever detail: the rifle uses an enclosed polymer bolt guide designed to help maintain reliable bolt operation in harsh conditions. The trigger group can also be removed from the lower receiver without tools, reinforcing the platform’s emphasis on serviceability and modularity.

Put all of those features together, and the Mk 22 starts to make sense. Its defining feature isn’t one component, it is the way the components cooperate.

Barrett MRAD Mk 22 Calibers Explained

The smartest way to understand the Barrett MRAD Mk 22 is to stop thinking of its three calibers as simple options on a catalog page. Each one changes what the rifle is best suited to do. The platform essentially gives the same precision-rifle architecture three different jobs.

Barrett currently lists 7.62×51mm NATO, .300 Norma Magnum, and .338 Norma Magnum for the Mk 22. All use a 10-round magazine, but the barrel length changes from 20 inches in 7.62×51mm to 26 inches in .300 Norma Magnum and 27 inches in .338 Norma Magnum. 

7.62×51mm NATO

The 7.62×51mm NATO configuration is the smallest and lightest Mk 22 setup. Its 20-inch barrel and 42.4-inch overall length make it considerably more compact than the two magnum configurations. Barrett lists a 1:8-inch twist rate for this version.

It therefore makes sense as the more portable member of the family. You’re still looking at a rifle weighing nearly 14 pounds before adding an optic and other equipment, though, so “compact” is relative.

.300 Norma Magnum

Move to .300 Norma Magnum, and the Mk 22 grows to a 26-inch barrel and 48.4-inch overall length. Its 15.2-pound weight is 1.3 pounds heavier than the 7.62 configuration.

This configuration represents the middle ground: more emphasis on extended-range precision while retaining a relatively manageable rifle package.

.338 Norma Magnum

At the top end is .338 Norma Magnum, using a 27-inch barrel and weighing 15.2 pounds. Barrett gives it a 1:9.4-inch twist rate and a 49.4-inch overall length.

The important takeaway isn’t that one caliber is universally “best.” The Mk 22’s real advantage is that the same modular platform can be configured around different precision requirements. That is the concept that gives the rifle its name, and much of its military appeal.

Barrett MRAD Mk 22 Accuracy and Performance

A precision rifle can have impressive specifications on paper and still fall short when the conditions become difficult. That is why the Barrett MRAD Mk 22’s performance is more useful when viewed as a complete system rather than reduced to one accuracy number.

Barrett currently describes the Mk 22 as delivering sub-MOA performance, while its architecture is built around the three-caliber system discussed earlier. The manufacturer also identifies the rifle as the winner of the USSOCOM Advanced Sniper Rifle (ASR) and U.S. Army Precision Sniper Rifle (PSR) contracts.

Accuracy and Precision

“Sub-MOA” is an important specification, but it shouldn’t be mistaken for a guarantee that every shooter, cartridge, or environmental condition will produce identical groups. Ammunition consistency, optics, barrel condition, temperature, wind, and shooter technique can all influence practical accuracy.

Independent testing has also examined the MRAD Mk 22 rather than relying solely on manufacturer claims. One detailed evaluation tested the rifle in .300 Norma Magnum using 215-grain match ammunition, providing a useful real-world perspective alongside Barrett’s published specifications.

Performance Comes From the Whole System

The Mk 22’s performance advantage isn’t just the barrel. Its rigid aluminum chassis, adjustable stock, optic rail, modular barrel architecture, and bolt-action design are intended to work together as one precision platform.

Barrett specifically highlights the folding stock, adjustable cheek piece, M-LOK system, and suppressor-capable muzzle brake as part of the rifle’s configuration.

That distinction matters. At extended distances, tiny inconsistencies can become increasingly noticeable. A rifle that provides a consistent interface between the shooter, optic, action, and barrel gives the user a better foundation for repeatable results.

And that’s arguably the more interesting aspect of Barrett MRAD Mk 22 performance: its goal isn’t simply to shoot accurately once. It’s designed to provide a repeatable precision platform that can be adapted when the mission, or caliber requirement, changes.

Barrett MRAD Mk 22 in U.S. Military Service

The Barrett MRAD Mk 22 becomes much more interesting when you look at why the U.S. military wanted it in the first place. This wasn’t simply a case of replacing an aging rifle with a newer one. The Army was looking for a precision system that could cover several roles without forcing sniper teams to carry multiple single-caliber rifles.

In March 2021, the U.S. Army awarded Barrett a $49.9 million, five-year contract for approximately 2,800 MK22 rifles under its Precision Sniper Rifle program. The system was selected to replace the Army’s M2010 and M107 sniper rifles and was specified around three calibers: 7.62×51mm NATO, .300 Norma Magnum, and .338 Norma Magnum.

From SOCOM to the Army

The Mk 22 had already established its credentials through the USSOCOM Advanced Sniper Rifle program before the Army contract.

That history matters because the rifle was essentially being asked to solve a common problem: how do you give a sniper access to different capabilities without issuing several complete weapon systems?

Army testing highlighted exactly this point. Soldiers involved in operational testing noted that the modular design could be tailored to mission requirements, while the Army described the system as capable of changing calibers to suit the operating environment.

The Marine Corps Joins the Picture

The Mk 22 eventually moved beyond SOCOM and the Army. In November 2024, Barrett announced that the U.S. Marine Corps had reached full operational capability with the MRAD Mk 22 Mod 0 Advanced Sniper Rifle, a year ahead of schedule.

That wider adoption says something important about the rifle. Its appeal isn’t only the ability to shoot at long range. It’s the combination of precision, modularity, and common platform architecture.

The Army’s own equipment documentation lists the Mk 22’s mission around precision engagements out to 1,500 meters, while emphasizing its modular, field-replaceable multi-barrel design. 

So the Mk 22 represents a shift in thinking: rather than building a different rifle around every requirement, the military can adapt one precision platform to several of them.

Barrett MRAD Mk 22: Strengths and Limitations

The Barrett MRAD Mk 22 looks impressive on paper, but a useful evaluation needs more than a list of strengths. Its modular design solves several problems, yet that flexibility comes with trade-offs. The same rifle that can change between three calibers is also a substantial piece of equipment.

Key Strengths

Modularity is the Mk 22’s biggest advantage. Barrett says the system can convert between 7.62×51mm NATO, .300 Norma Magnum, and .338 Norma Magnum, giving military users a common rifle architecture for different requirements. The company’s current specifications also list interchangeable barrel configurations and a 10-round magazine.

Precision is another major strength. Barrett advertises sub-MOA performance for the Mk 22, while the platform’s adjustable stock, cheek piece, optic rail, and rigid aluminum chassis are designed around consistent shooter positioning.

Then there’s serviceability. The trigger group can be removed without tools, while the enclosed polymer bolt guide is intended to support smooth operation in harsh environments. These details aren’t flashy, but they’re the sort of engineering choices that become valuable when equipment has to work outside a clean range.

Potential Limitations

The obvious drawback is weight. Barrett lists the Mk 22 at 13.9 pounds in 7.62×51mm configuration and 15.2 pounds in both .300 and .338 Norma Magnum configurations, before optics and other equipment are added.

Its modularity can also mean greater logistical complexity. Supporting several caliber configurations requires compatible barrels, magazines, ammunition, and associated equipment.

So the Mk 22 isn’t trying to be the lightest precision rifle around. Its design priority is adaptability first, portability second. That distinction explains much of the rifle’s character, and why it has attracted military interest.