Battle of the AR-9 | Which One Shoots Best?

Published on September 16, 2025
Duration: 22:29

This video provides an in-depth comparison of several AR-9 platforms, discussing their operating systems (direct blowback, delayed blowback, RDB), magazine compatibility (Glock, Colt, CZ Scorpion), and shooting characteristics. Instructors Kyle and Jason offer their subjective ratings and insights on recoil impulse, reliability, and overall feel, highlighting key differences that impact the shooting experience.

Quick Summary

An AR-9 is an AR-15 platform chambered in pistol calibers like 9mm, often using direct or delayed blowback systems. Key platforms compared include CMMG (RDB), Daniel Defense, Aero Precision, and Griffin Armament, highlighting differences in operating systems, magazine compatibility (Glock, Colt, CZ Scorpion), and shooting dynamics.

Frequently Asked Questions

What is an AR-9 and how does it differ from an AR-15?

An AR-9 is essentially an AR-15 platform chambered in pistol calibers, most commonly 9mm. While it shares the familiar AR-15 ergonomics and controls, it operates differently due to the pistol cartridge, often using direct blowback or delayed blowback systems instead of a direct impingement gas system.

What are the main operating systems found in AR-9s?

The primary operating systems for AR-9s are direct blowback, which is simple and reliable but can have more felt recoil, and delayed blowback systems like CMMG's RDB (Resonance Delay Blowback), which use mechanical means to slow the bolt carrier group for a softer shooting experience.

Which AR-9 platforms were compared in the video?

The video compares several AR-9 platforms including the CMMG Mk5, CMMG Banshee, Daniel Defense PCC, Aero Precision EPC9, and Griffin Armament Mark II, evaluating their operating systems, magazine compatibility, and shooting characteristics.

What are reliable magazine options for AR-9s?

Reliable magazine options for AR-9s commonly include Glock magazines, Colt SMG magazines, and CZ Scorpion magazines. The video emphasizes that using quality, compatible magazines is crucial for the reliable function of any AR-9.

How does the CMMG RDB system improve the AR-9 shooting experience?

CMMG's RDB (Resonance Delay Blowback) system uses a mechanically locked bolt with angled cuts. This system delays the unlocking of the bolt, expelling gas and energy before unlocking, which significantly reduces felt recoil and bolt bounce for a smoother shooting experience.

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