# CMMG Resolute MK57: Precision 5.7mm Sport Rifle, 20-Round Capacity

**Brand:** CMMG
**Category:** Semi-Automatic Rifles
**Caliber:** 5.7x28mm

## Specifications

- **Caliber:** 5.7x28mm
- **Barrel Length:** 16.1"
- **Capacity:** 20 rounds
- **Weight:** 99.2 oz
- **Overall Length:** 32.5"
- **UPC:** 810144728278
- **SKU:** UCEGJAiW6

## Description

The CMMG Resolute MK57 is a modern sporting rifle chambered in 5.7x28mm. The caliber delivers low recoil and flat trajectory, which makes follow-up shots fast and precise. At 6.2 lbs with a 16.1-inch barrel and 20-round capacity, it handles well in tight spaces.

### Key Specifications
- **Caliber:** 5.7 x 28mm
- **Barrel Length:** 16.1 inches
- **Capacity:** 20 rounds
- **Weight:** 6.2 lbs
- **Manufacturer:** CMMG
- **Model:** Resolute MK57
- **Type:** Modern Sporting Rifle
- **Condition:** New in Box

### Detailed Features

- **Operating System**: Radial Delayed Blowback: smooth cycling and consistent reliability.
- **Barrel Material**: 4140 Chrome Moly Steel with Salt Bath Nitride finish for wear resistance.
- **Muzzle Device**: CMMG ZEROED Muzzle Brake for reduced recoil during rapid fire.
- **Receiver Construction**: Billet 6061 T6 Aluminum upper; Mk57 Forged 7075 T6 Aluminum lower. Both materials keep weight down without sacrificing strength.
- **Ambidextrous Features**: Ambidextrous charging handle and safety selector accommodate left-handed shooters.

## What Customers Say

*AI-generated insights from customer reviews*

The CMMG Resolute MK57 draws mixed but generally favorable feedback. Most owners praise its accuracy and low recoil in the 5.7mm caliber. Both new shooters and experienced ones find the platform manageable and fun to run. The 20-round capacity keeps range sessions moving without constant reloads.

Build quality and reliability are consistent positives: the rifle runs well across various 5.7mm loads with few reported malfunctions. The modern design and customization options are a draw for owners who like to accessorize.

The main criticism is ammunition. 5.7mm costs more than common calibers and can be harder to find, which adds up for high-volume shooters. Some traditional-leaning buyers also prefer established calibers over newer offerings. Those practical considerations are worth factoring into a purchase decision.

## Pricing

**3 offers available**

| Vendor | Price |
|--------|-------|
| Grabagun Com | $1599.99 |
| Shootingsurplus Com | $1627.59 |
| Buds Gun Shop | $1633.99 |

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*Data from [GunsNation](https://gunsnation.com)*