# CMMG Resolute 100 AR Rifle, 5.7x28mm, 40-Round Black

**Brand:** CMMG
**Category:** AR Style Rifles
**Caliber:** 5.7x28mm

## Specifications

- **Caliber:** 5.7x28mm
- **Barrel Length:** 16.1"
- **Capacity:** 40 rounds
- **UPC:** 816422029648
- **SKU:** UCEN9zdMO

## Description

The CMMG Resolute 100 is a semi-automatic AR-platform rifle chambered in 5.7x28mm. Like the rest of the Resolute line, it runs CMMG's radial delayed blowback system adapted for the 5.7x28mm cartridge. The 16.1-inch barrel and 40-round magazine make it a capable range rifle with an unusual caliber choice.

### Key Specifications
- **Manufacturer:** CMMG
- **Model:** Resolute 100
- **Type:** Modern Sporting Rifle (AR)
- **Caliber:** 5.7 X 28mm
- **Barrel Length:** 16.1 inches
- **Capacity:** 40 rounds
- **Condition:** New in Box
- **Finish Color:** Black
- **Grips & Stock Material:** Polymer

### Features
The Resolute 100 is the entry-level model in the Resolute line. Polymer furniture throughout keeps weight down. Semi-automatic action with a 40-round magazine capacity. The 5.7x28mm produces less recoil than typical rifle cartridges and maintains higher velocity than pistol calibers, which makes it useful for both new shooters and those who've found high-recoil platforms tiring.

The 16.1-inch barrel is maneuverable and compatible with standard AR accessories.

## What Customers Say

*AI-generated insights from customer reviews*

Owners of the Resolute 100 generally appreciate what 5.7x28mm offers in an AR chassis: low recoil, high velocity, and the 40-round magazine. The lightweight build makes it comfortable over extended sessions, and the caliber attracts shooters who want something different from the standard 5.56 or 9mm options.

The ergonomics hold up well in most reviews. The polymer furniture feels adequate, and the AR platform means the controls are familiar to anyone who's shot an AR before.

Reliability comes up as a mixed point. Most users report smooth operation, but a segment mentions inconsistent performance with certain ammunition types, particularly during rapid fire. Testing a few different brands before settling on one load is a common recommendation from longer-term owners.

Ammo cost and availability affect the Resolute 100's practical calculus. 5.7x28mm costs more per round than 5.56 and isn't stocked as widely. Some buyers on a tighter budget weigh this against the caliber's advantages and conclude the 5.56 makes more sense economically. The community around CMMG's 5.7x28mm rifles is active online, which helps with troubleshooting and load recommendations.

## Pricing

**1 offers available**

| Vendor | Price |
|--------|-------|
| Grabagun Com | $1299.99 |

## Similar Products

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