An MP5 That Shoots 5.56 or .308?! (AP53 & AP51)

Published on September 9, 2025
Duration: 12:24

This expert review delves into the Century Arms AP51 and AP53 PDWs, unique roller-delayed blowback firearms chambered in .308 and 5.56mm respectively. The review highlights their HK33 and MP5 heritage, discussing features like coupled magazines, suppressor compatibility, and the effectiveness of the roller-delayed system in managing recoil for these potent calibers. It provides practical insights for potential owners, including weight, accessory options, and range performance.

Quick Summary

The Century Arms AP51 and AP53 PDWs adapt the MP5's roller-delayed blowback system to rifle calibers (.308 and 5.56mm, respectively). This system provides a straight-back recoil impulse, making the .308 surprisingly controllable and the 5.56mm exceptionally soft, often feeling less than a 9mm MP5.

Chapters

  1. 00:00Introduction: MP5 Variants in Rifle Calibers
  2. 00:33Presenting the AP51 and AP53 PDWs
  3. 00:50AP53 Overview and G3 Comparison
  4. 01:05AP53 Details: HK33 Heritage, MKE Import
  5. 01:32Roller-Delayed Blowback Mechanism Explained
  6. 02:06AP53 Features: Magazines, Accessories, Suppressors
  7. 03:59AP53 Sights, Optics, and Feel
  8. 04:26AP51 (.308) Features and Comparison
  9. 05:57AP51 and AP53 Weights
  10. 07:01Range Session: AP51 (.308) Shooting Experience
  11. 08:39Range Session: AP53 (5.56) Shooting Experience
  12. 10:14Conclusion: Which One is Right for You?

Frequently Asked Questions

What makes the Century Arms AP51 and AP53 unique firearms?

These firearms are unique as they adapt the classic MP5 roller-delayed blowback system to rifle calibers. The AP51 fires .308 (7.62x51 NATO), and the AP53 fires 5.56mm (.223 Remington), offering potent firepower in a compact PDW platform.

How does the roller-delayed blowback system affect recoil in the AP51 and AP53?

The roller-delayed blowback system is highly effective at managing recoil. It provides a straight-back impulse, making the .308 in the AP51 surprisingly controllable and the 5.56mm in the AP53 feel exceptionally soft, often comparable to or less than a 9mm MP5.

What are the key features of the Century Arms AP53 PDW?

The AP53, based on the HK33 generation, features a compact PDW style, traditional HK sights, an optic claw mount, and compatible coupled magazines. It has a 1/2x28 thread pitch for suppressors and a Navy-style lower receiver.

What are the specifications for the Century Arms AP51 PDW?

The AP51 is chambered in .308 (7.62x51 NATO) and features an 8.3-inch cold hammer-forged barrel. It has a 5/8x24 thread pitch for suppressors, a Navy-style lower, and weighs 7.9 lbs unloaded. It comes with a 20-round magazine.

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