Description
There is something special about touching off a .308 from a platform this size, and the Century Arms AP51 delivers that experience with real pedigree behind it. This is a faithful take on the HK51 PDW concept, built by MKE, the same Turkish military manufacturer producing the wildly popular AP5 series. At its heart is the classic roller-delayed blowback action, a design that has earned its reputation over five decades of hard service around the world. The 8.3 inch cold hammer forged barrel wears a birdcage flash hider and 5/8×24 threading, so swapping muzzle devices or adding a suppressor is straightforward.
What Sets the AP51 Apart
Century didn't cut corners on the details here. You get a Navy style lower with an ambidextrous selector, a standard G3 trigger group, and the wider MP5-compatible handguard that gives your support hand plenty of real estate. The manganese phosphate finish is the same no-nonsense treatment found on military pattern guns, and the whole package has been tested to NATO environmental standards for salt, humidity, temperature extremes, sand, and dust. Sights are the familiar fixed front post with an adjustable rear drum, and the included claw mount Picatinny rail makes adding an optic simple without permanent modification.
Shooting the Century AP51
The Magpul BTR brace comes installed from the factory, which helps tame the recoil you'd expect from a rifle cartridge in a 7.9 pound package. Feeding comes from G3-pattern polymer magazines, and two 20-rounders ship with the gun, so spares are affordable and easy to find. Whether you're running steel at the range, building out a truck gun, or just want the closest thing to an HK51 without the collector price tag, this checks the boxes.
Everything in the Box
Century rounds out the package with a sling, cleaning kit, and a hard carry case, so you're ready for the range the day you pick it up. Roller-delayed .308 pistols don't come along often, and this one gets the details right.
Key Specifications
- Model: AP51
- Manufacturer Part Number: HG7887MB-N
- UPC: 787450951860
- Caliber: .308 Win / 7.62×51 NATO
- Action: Semi-Auto, Roller-Delayed Blowback
- Barrel Length: 8.3", Cold Hammer Forged
- Muzzle Thread: 5/8×24 with Birdcage Flash Hider
- Capacity: 20 Rounds
- Magazines Included: 2
- Brace: Magpul BTR
- Sights: Fixed Front, Adjustable Rear
- Safety: Ambidextrous Manual Safety
- Finish: Manganese Phosphate, Black
- Overall Length: 32.7"
- Weight (Unloaded): 7.9 lbs
What’s Included
- Century Arms AP51 pistol with Magpul BTR brace installed
- Two 20-round G3-pattern polymer magazines
- Claw mount 1913 Picatinny rail
- Sling
- Cleaning kit
- Hard carry case
Frequently Asked Questions
Who makes the Century Arms AP51?
The AP51 is produced by MKE, the Turkish military manufacturer behind the popular Century AP5 series of MP5-pattern pistols. It's built on the roller-delayed blowback design and tested to NATO environmental standards for salt, humidity, hot and cold temperatures, sand, and dust. Century Arms imports and backs the pistol here in the States.
What magazines does the AP51 use?
It feeds from standard G3-pattern magazines, and two 20-round polymer mags come in the box. Since G3 mags were produced in huge numbers for decades, surplus and new-production magazines are plentiful and inexpensive. That's a big practical advantage over more obscure large-format pistol platforms.
Is the AP51 suppressor ready?
Yes, the 8.3 inch cold hammer forged barrel is threaded 5/8×24, which is the common thread pitch for .30 caliber muzzle devices and suppressors. A birdcage style flash hider comes installed from the factory. Just keep in mind that roller-delayed guns run a bit dirty suppressed, so plan on regular cleaning.
Can I mount an optic on the Century AP51?
You can. The pistol ships with a claw mount 1913 Picatinny rail that attaches to the receiver, giving you a solid platform for red dots or magnified optics. If you'd rather run it old school, the fixed front post and adjustable rear drum sights work just like the classic HK setup.





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