Century Arms Ap51 7.62X51 8.3 Magpul Bsl Brace

The Century Arms AP51 7.62x51 NATO pistol is a semi-automatic, roller-lock delayed blowback design built for shooters who want rifle-caliber power in a compact, maneuverable platform. Based on the proven HK51 PDW lineage and manufactured in Turkey to NATO environmental standards, the AP51 delivers the ballistics and reliability of full-power rifle ammunition in a package that handles like a pistol. At 23.3 inches overall with an 8.3-inch cold hammer-forged barrel, it strikes a practical balance between velocity and ergonomic control—ideal for home defense, close-quarters shooting, or anyone exploring what a purpose-built short-barreled rifle alternative can do.

The AP51 ships with a Magpul BTR brace, two 20-round G3-pattern polymer magazines, and a bird cage-style flash hider. The receiver is stamped steel, the handguard is wide and MP5-compatible, and controls are arranged for ambidextrous operation—selector lever, charging handle, and safety all accessible from either side. At 7.9 pounds unloaded, it's substantial enough to manage recoil in the 7.62x51 NATO round but light enough to handle for extended periods. Fixed front sights pair with fully adjustable rear sights, giving you a battle-proven sight picture right out of the box.

This isn't a precision target gun or a hunting rifle in the traditional sense—it's a specialized tool for shooters who need rifle-caliber performance from a pistol-sized frame, or who appreciate the engineering heritage of the HK platform at a price that makes ownership accessible. Military-grade design language, proven action type, and honest ergonomics make the AP51 a straightforward choice for those who value function over flash.

Key Features

• Semi-automatic roller-lock delayed blowback action, 7.62x51 NATO caliber
• Cold hammer-forged 8.3-inch barrel with bird cage flash hider
• Ambidextrous controls: selector, charging handle, and safety for either-hand operation
• MP5-compatible wide handguard and Navy-style assembly
• Fixed front sight, fully adjustable rear sight
• Magpul BTR synthetic brace included; 20-round G3-pattern magazines (two included)
• Stamped steel receiver, tested to NATO environmental standards for salt fog, humidity, heat, cold, sand, and dust
• Unloaded weight: 7.9 lbs; overall length: 23.3 inches

Specifications

Frequently Asked Questions

Is the AP51 7.62x51 legal to own as a pistol with a brace?

That depends on your state and local laws. Firearm regulations—especially regarding pistol braces and short-barreled rifles—vary significantly by jurisdiction. We strongly recommend you check with your local law enforcement or a qualified attorney before purchase to confirm compliance in your area.

What magazines work with the AP51?

The AP51 uses G3-pattern magazines and ships with two 20-round polymer magazines. Any G3-compatible magazine should function in the gun, but we recommend testing with quality, well-maintained examples.

Can I swap the Magpul brace for a different one?

The AP51 comes equipped with a Magpul BTR brace. Compatibility with other braces would depend on the specific design and your local regulations. Consult the manufacturer or a gunsmith before attempting swaps.

What's the sight picture like on the AP51?

The AP51 features fixed front sights and fully adjustable rear sights, giving you a traditional irons setup for accurate aiming. This is a battle-tested sight arrangement that requires no batteries and works in any light condition once you dial in your zero.