# Diamondback DBX57 Tactical 5.7mm Pistol - Lightweight M-LOK Black

**Brand:** Diamondback Firearms
**Category:** Full Size Handguns
**Caliber:** 5.7x28mm

## Specifications

- **Caliber:** 5.7x28mm
- **Barrel Length:** 8"
- **Capacity:** 20 rounds
- **Finish:** Stainless Steel
- **Weight:** 48 oz
- **Overall Length:** 16"
- **UPC:** 810035752696
- **SKU:** UCEGBnSzQ

## Description

The Diamondback DBX57 is a semi-automatic pistol chambered in 5.7x28mm with an AR-style platform. It runs a 20-round magazine (plus one in the chamber), has an 8-inch barrel, and comes in at 3 lbs., light for the capacity and caliber combination. The 7075-T6 aluminum receiver and black hard coat anodized finish give it durability without adding bulk.

### Key Specifications
- **UPC:** 810035752696
- **Caliber:** 5.7x28mm
- **Action:** Semi-Automatic
- **Capacity:** 20+1 rounds
- **Barrel Length:** 8 inches
- **Weight:** 3 lbs.
- **Finish:** Black Hard Coat Anodized
- **Receiver Material:** 7075-T6 Aluminum

### Detailed Features
The AR-style platform puts familiar controls in familiar places, which helps shooters transition from an AR-15 without a steep learning curve. Magpul MOE K grips and M-LOK handguards handle the furniture. The M-LOK slots let you add lights, lasers, or other accessories without proprietary rail adapters. Barrel twist is 1:9", which stabilizes the 5.7x28mm round well at typical pistol ranges. The muzzle device also works to reduce felt recoil, which is already mild in this caliber.

### Usage Scenarios
1. **Home Defense**: At 16 inches overall, it moves through interior spaces more easily than a rifle while still offering 20+1 capacity.
2. **Competitive Shooting**: The low-recoil 5.7x28mm round and large capacity make it practical for speed-focused shooting events.
3. **Target Practice and Varmint Control**: The caliber's flat trajectory and effective range suit outdoor target work.

## Frequently Asked Questions

**Q: What caliber is the DBX57?**

A: The DBX57 is chambered in 5.7x28mm.

**Q: Who makes the DBX57?**

A: The DBX57 is made by Diamondback.

**Q: What is the barrel length of the DBX57?**

A: It has an 8-inch barrel.

**Q: How many rounds does the DBX57 hold?**

A: It has a 20+1 capacity.

**Q: What type of firearm is the DBX57?**

A: The DBX57 is a semi-automatic pistol built on an AR-style platform with a 7075-T6 aluminum receiver.

**Q: Does the DBX57 have a threaded barrel?**

A: Yes, the DBX57 has a threaded barrel, as noted in the product titles.

**Q: Does the DBX57 have M-LOK handguard slots?**

A: Yes, it has M-LOK handguards that accept lights, lasers, and other accessories.

**Q: Where can I buy the DBX57?**

A: Compare current vendor offers on this page.

## What Customers Say

*AI-generated insights from customer reviews*

The Diamondback DBX57 generally gets positive marks for its design concept, with a few real-world concerns worth knowing.

The M-LOK compatibility and lightweight AR-style platform come up most often in positive feedback. Fans of the 5.7x28mm caliber note its low recoil and high velocity, which makes rapid follow-up shots manageable and accurate at range. The 20+1 capacity for a pistol-format firearm is another recurring plus.

The criticisms center on ammunition. 5.7x28mm is less widely available than 9mm or .45 ACP, and it costs more per round. Both matter for regular practice. Some owners also report occasional feeding issues, which are noted more often with certain ammunition brands. Community discussions compare it directly to the FN Five-seveN and PS90 in the same caliber, where the Diamondback comes in at a lower price but with a less proven track record.

For buyers who already reload or have reliable 5.7x28mm sources, the DBX57 is a capable platform at a competitive price. For those who haven't priced out the ammunition, that should factor into the buying decision.

## Pricing

**5 offers available**

| Vendor | Price |
|--------|-------|
| Shootingsurplus Com | $873.05 |
| Buds Gun Shop | $884.99 |
| Impactguns Com | $889.69 |
| Guns Com | $936.99 |
| Kygunco Com | $940.00 |

## Reviews

**Average Rating:** 4.0/5 (1 reviews)

> **lizzy_b** (4/5): Overall, the DBX57 has been good, but mine has a few small dings. They are not major defects, though those blemishes still detract somewhat from an otherwise positive impression of the firearm.

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