The Century Arms AP51 is a PDW-style semi-automatic pistol chambered in 7.62×51 NATO, built for compact, high-caliber utility in range, training, and tactical support roles. Its short, threaded barrel and Picatinny optics rail make it suitable for users who prioritize modularity and accessory compatibility. The AP51 presents a compact platform for shooters seeking a G3-pattern control layout with ambidextrous controls in a pistol package.

This model ships with 20-round magazines; magazine capacity and shipment rules vary by jurisdiction. States that enforce 10-round limits include: Hawaii, California, Connecticut, District of Columbia, Illinois, Maryland, Massachusetts, New Jersey, New York, Rhode Island, Vermont, Washington, and Colorado. The supplied product notes also indicate no direct ship to Rhode Island or Washington and no sale to Illinois under PICA.

Key Specifications

• The caliber is 7.62×51 NATO (.308 Winchester), intended for standard 7.62×51 ammunition types.
• The action is a semi-automatic roller-lock delayed blowback configuration for this model.
• The barrel measures 8.3 in and includes a 5/8×24 threaded muzzle paired with a birdcage-style flash hider.
• The standard magazine capacity is 20 rounds and the package includes 2 magazines.
• The overall length is listed as 23.3 in with an unloaded weight of approximately 126.98 oz (7.9 lb).
• The receiver is described as stamped steel while the grip assembly is a polymer Navy-style unit with an ambidextrous selector.
• Sighting and optics fitment include a fixed front sight with an adjustable rear sight mounted on a 1913 Picatinny optics rail.
• Additional features include an ambidextrous safety, paddle magazine release, Picatinny optics mount, and a 5/8×24 threaded muzzle with birdcage flash hider.

With its compact footprint and G3-pattern ergonomics, the AP51 is a practical choice for shooters seeking a high-caliber PDW-style pistol for the range or tactical training. The combination of a threaded barrel, optics-ready rail, and ambidextrous controls makes it a flexible platform for users who value modularity and straightforward handling. Verify local magazine and state shipping restrictions before purchase to ensure compliance with regional laws.