CMMG Mk57 5.7x28mm AR 15 Review

Published on July 25, 2018
Duration: 18:44

This review by Sootch00 provides an in-depth look at the CMMG Mk57 in 5.7x28mm, highlighting its unique Radial Delayed Blowback system and comparing its performance and components to traditional AR-15 platforms. The expert assessment covers ballistics, ammunition options, and practical shooting characteristics, offering valuable insights for firearm enthusiasts.

Quick Summary

The CMMG Mk57 is an AR-15 platform rifle chambered in 5.7x28mm, offering high velocity with low recoil. Its Radial Delayed Blowback system allows for a lighter bolt carrier group and a softer shooting experience. The 5.7x28mm cartridge provides superior armor penetration and extended range compared to 9mm, with less recoil than 5.56x45mm.

Chapters

  1. 00:00Introduction to 5.7x28mm
  2. 01:35CMMG Mk57 Overview
  3. 02:45Caliber Comparison
  4. 04:31Technical Specifications
  5. 07:11Radial Delayed Blowback System
  6. 11:17Ammunition and Magazines
  7. 13:17Pros and Cons vs 9mm

Frequently Asked Questions

What is the CMMG Mk57 and what caliber does it use?

The CMMG Mk57 is an AR-15 platform rifle chambered in the 5.7x28mm caliber. It is known for offering high velocity with low recoil, making it a unique option in the AR-15 market.

How does the 5.7x28mm cartridge compare to 9mm and 5.56x45mm?

The 5.7x28mm cartridge offers a longer effective range than 9mm (out to 200 yards) with less recoil than 5.56x45mm. It also boasts armor-piercing capabilities and lighter weight compared to 9mm.

What is the CMMG Radial Delayed Blowback system?

CMMG's patented Radial Delayed Blowback system uses gas pressure to delay the bolt's movement. This allows for a lighter bolt carrier group and a softer shooting experience compared to traditional blowback systems.

What are the key technical specifications of the CMMG Mk57?

The CMMG Mk57 features a 7075-T6 aluminum receiver set, a 7-inch M-LOK handguard, and an 8-inch 4140 chrome-moly barrel. It is designed to accept standard FN or ProMag 5.7x28mm magazines.

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