# ZRO Delta The One 9mm 4in Blue/Black

**Brand:** ZRO Delta
**Category:** Semi-Automatic Handguns
**Caliber:** 9mm

## Specifications

- **Caliber:** 9mm
- **Barrel Length:** 4"
- **UPC:** 081106928290
- **SKU:** UC1QWyP8k

## Description

The ZRO Delta The One is a modular 9mm semi-automatic pistol built around a 4-inch 4140 precision match barrel and an interchangeable metal-inserted polymer frame system. The slide carries a direct optic cut for a U.S. Optics DRS 2.0 with the correct attachment screws, and the pistol ships with modular dust cover, magwell, and backstrap components alongside white dot front and rear sights.

### Key Specifications
- **Brand:** ZRO Delta
- **Model:** The One
- **Caliber:** 9mm
- **Action:** Semi Auto
- **Capacity:** 15+1 Rounds
- **Barrel Length:** 4 in
- **Finish:** Blue/Black
- **Weight:** 21.5 oz

### Detailed Features
- 4-inch 4140 precision match barrel
- Modular metal-inserted polymer frame/handle with interchangeable dust cover and magwell components
- Modular standard backstrap system for grip customization
- Direct optic cut for U.S. Optics DRS 2.0 with the correct mounting screws
- White dot front and rear sights

## Frequently Asked Questions

**Q: What caliber is the ZRO Delta The One?**

A: The One is chambered in 9mm.

**Q: What is the barrel length of the ZRO Delta The One?**

A: It has a 4 inch precision match barrel.

**Q: How many rounds does the ZRO Delta The One hold?**

A: It holds 15+1 rounds.

**Q: Who makes the ZRO Delta The One?**

A: It's made by ZRO Delta.

**Q: What type of firearm is the ZRO Delta The One?**

A: It's a modular 9mm semi-automatic pistol with an interchangeable metal-inserted polymer frame system, including swappable dust cover, magwell, and backstrap components.

**Q: Where can I buy the ZRO Delta The One?**

A: Compare current vendor offers on this page.

## What Customers Say

*AI-generated insights from customer reviews*

Shooters drawn to The One tend to be people who already know they want a modular platform, and feedback usually centers on how well the swappable frame and backstrap pieces actually fit together. Reports describe the build as tight and precise, consistent with the match-grade barrel, though a modular system like this asks more of the owner to set up correctly than a fixed-frame pistol.

The direct optic cut for the DRS 2.0 draws a lot of attention from buyers who plan to run a red dot from day one, since a purpose-built cut avoids the fitment issues that come with universal optic plates. Grip feel gets mixed reactions depending on which backstrap configuration a shooter settles on, which is part of the appeal for people who want to dial in their own fit.

Value conversations around The One usually acknowledge it sits in a different price tier than mass-market striker pistols, and buyers who choose it are typically paying for the modularity and match barrel rather than looking for a budget option. Owners who want a highly configurable 9mm pistol see that as the entire point.

## Pricing

**1 offers available**

| Vendor | Price |
|--------|-------|
| Buds Gun Shop | $547.49 |

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