Last updated June 2026 · By Nick Hall, tracks new service-rifle and AR-pattern launches for USA Gun Shop
Quick take: FN Herstal just pulled the cover off a new rifle right before the Eurosatory defense show in Paris, and the FN ARKA is a clever one. It looks like an AR-15 on the outside and runs FN SCAR guts on the inside, a short-stroke piston FN says gives you SCAR-grade reliability in a lighter, more familiar package. It launched in 5.56 NATO, it’s suppressor-ready out of the box, and it’s aimed at European military contracts first. FN hasn’t said a word about US civilian pricing or availability.
- What it is: The FN ARKA, an AR-15-type rifle that uses the FN SCAR’s short-stroke piston operating system. Chambered in 5.56 NATO at launch, fully ambidextrous, suppressor-ready, with AR ergonomics and STANAG magazine compatibility.
- Why it matters: FN is putting proven SCAR internals into a gun that handles, mounts, and accessorizes like an AR-15. If the semi-auto version reaches the US market, it’d be one of the few factory piston ARs with real military pedigree behind it.
- What’s next: The ARKA debuted as a military-tender rifle, with Europe as the first target. FN hasn’t announced a US civilian release, price, or date.
- Who it’s aimed at: European armed forces shopping for a new 5.56 service rifle, including the UK’s search to replace the aging L85 bullpup.
A SCAR in an AR Suit
The FN ARKA is an AR-15-format rifle running the FN SCAR’s short-stroke gas piston system, so it handles like the AR you already know but cycles like a SCAR. That’s FN’s own pitch, and it’s the cleanest way to describe the gun.
The internals are a take on the SCAR’s piston, with a layout that owes a clear debt to the old AR-18. Piston fans will spot it right away. It’s the same operating principle that’s kept the SCAR running hard in military service for two decades, now wrapped in a different shell.
And the shell is the whole point. Where the SCAR has its own proprietary stock, controls, and handguard, the ARKA is built around AR-15 ergonomics and parts. It feeds from STANAG-pattern magazines, the same mags your AR already runs, and it takes any standard AR pistol grip or stock. For a unit that already owns AR furniture, mags, and training, that means the ARKA drops into the existing supply chain instead of starting a new one. Controls are fully ambidextrous, with a mirrored magazine release, bolt catch, and safety selector, plus a T-shaped charging handle and a forward assist. A full-length top Picatinny rail runs the receiver for optics and night vision.
Suppressor-Ready From the Factory
The ARKA ships suppressor-ready, with both an adjustable gas block and a quick-detach muzzle device built into the base rifle. That combination tells you how FN expects the gun to be run.
The adjustable gas block lets a shooter tune the gun down when a can goes on, cutting back-pressure and gas in the face. The QD muzzle device gives the suppressor a fast, repeatable mounting point. Building both into the rifle instead of leaving them to the aftermarket says FN expects this thing to live suppressed.
And that design choice lands at an interesting moment over here. With the $200 federal tax stamp on suppressors gone as of January 1, a factory suppressor-ready rifle is a more attractive proposition for American buyers than it was a year ago, if FN ever brings a commercial version stateside. Our explainer on the National Firearms Act covers how the can side works now.
The Configurations FN Showed
FN showed the ARKA in two barrel lengths, a 14.5-inch standard and an 11.25-inch CQC, both offered in flat dark earth or black and with either a select-fire or semi-auto-only trigger pack.
The 14.5-inch gun comes with either a short or a long M-LOK handguard. The 11.25-inch CQC barrel pairs with the short handguard for close-quarters work. The select-fire guns are the military offering. A semi-auto-only ARKA is the version that would matter to civilian buyers in markets that allow it, and it’s the one we’ll be watching for stateside.
Why FN Built It: The European Rifle Race
FN built the ARKA for European military tenders, and the most obvious target is the United Kingdom’s hunt for a new 5.56 rifle to replace the long-troubled L85. The reveal was timed to Eurosatory for exactly that reason.
The L85, the SA-80-series bullpup, is the rifle British troops have carried and complained about for decades. FN has a structural edge in that race. It’s currently the only military-grade small arms maker in the UK, with a South London facility that’s been turning out 7.62 and .50 caliber machine guns in England for years.
FN’s VP for Small Arms, Christophe Soleil, put the pitch this way: “FN is pleased to complement its rifle portfolio with this new AR-15-type platform that is built upon the proven performance of the FN SCAR, currently in service with over 20 armed forces worldwide. The FN ARKA provides equivalent levels of reliability, durability, and performance, allowing customers to select the ergonomics and architecture that best suit their preferences.” You can read the full spec sheet on FN Herstal’s site.
Can You Buy an FN ARKA?
Not yet, and maybe not here. FN unveiled the ARKA as a military-tender rifle and hasn’t announced a US commercial version, a price, or a release date.
If a semi-auto ARKA does come to the American market, it’d slot in against the established premium piston ARs and the SCAR itself, and we’ll track it the moment FN says anything concrete. For now, if you want a do-everything 5.56 you can actually buy today, our best AR-15 rifles roundup and our best AR-15 brands tier list cover the field, including where FN already sits in it.
Frequently Asked Questions
Can you buy the FN ARKA in the US?
Not yet. FN unveiled the ARKA as a military-tender rifle aimed at European armed forces and has not announced a US commercial version, price, or release date. A semi-auto-only trigger pack exists, which is the configuration that would matter to civilian buyers if FN brings the rifle to the American market.
How is the FN ARKA different from the FN SCAR?
The ARKA uses the SCAR short-stroke piston operating system but wraps it in AR-15 ergonomics and parts compatibility. It feeds from STANAG AR magazines and accepts standard AR grips and stocks, where the SCAR uses its own proprietary furniture and controls.
What caliber is the FN ARKA?
FN launched the ARKA in 5.56 NATO and has not announced additional chamberings.
Is the FN ARKA piston or direct impingement?
It is a short-stroke gas piston rifle, the same operating principle as the FN SCAR, with internals that draw on the AR-18 design.
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