# SIG Sauer M18 9mm 3.9in Black

**Brand:** SIG Sauer
**Category:** Semi-Automatic Handguns
**Caliber:** 9mm

## Specifications

- **Caliber:** 9mm
- **Barrel Length:** 3.9"
- **UPC:** 798681699223
- **SKU:** UCE3nP10h

## Description

The SIG Sauer M18 is a striker-fired semi-automatic pistol chambered in 9mm with a 3.9-inch barrel. It ships optics-ready and includes a manual safety, accepting 17- or 21-round magazines. The pistol has polymer grips and is finished in black.

### Key Specifications
- **Brand**: SIG Sauer
- **Model**: M18
- **Caliber**: 9mm
- **Action**: Semi Auto
- **Barrel Length**: 3.9 inches
- **Capacity**: 17/21 rounds
- **Color/Finish**: Black

### Detailed Features
- Striker-fired action with manual safety
- Optics-ready slide compatible with the ROMEO1 optic
- Accepts both 17-round and 21-round magazines
- Polymer grip frame
- 3.9-inch barrel in a compact form factor

## Frequently Asked Questions

**Q: What caliber is the M18?**

A: The SIG Sauer M18 is chambered in 9mm.

**Q: Who makes the M18?**

A: The M18 is made by SIG Sauer.

**Q: What type of firearm is the M18?**

A: It is a striker-fired semi-automatic handgun with a 3.9-inch barrel and a polymer grip frame finished in black.

**Q: What is the barrel length of the M18?**

A: The M18 has a 3.9-inch barrel.

**Q: How many rounds does the M18 hold?**

A: The M18 accepts 17-round and 21-round magazines.

**Q: Is the M18 optic-ready?**

A: Yes, the M18 ships with an optics-ready slide.

**Q: Does the M18 have a manual safety?**

A: Yes, the M18 includes a manual safety.

**Q: Where can I buy the M18?**

A: Compare current vendor offers on this page.

## What Customers Say

*AI-generated insights from customer reviews*

Owners of the M18 tend to praise its reliable striker-fired action and the flexibility of the dual-capacity magazine setup. The optics-ready cut is a practical addition, and the included manual safety gives shooters who want that option a reason to pick the M18 over similar platforms.

Ergonomics draw consistent positive feedback. The polymer frame keeps weight down and the grip geometry suits a wide range of hand sizes. A few owners note that the trigger reset takes adjustment if they're coming from other striker-fired platforms, and opinions on the ROMEO1 pairing are split between those who keep it and those who swap to a different optic.

Value perception is generally good for what the M18 delivers at its price point. Some buyers mention that the off-duty configuration feels overpriced relative to the standard variant, while others see the manual safety and higher-capacity magazines as worth the difference.

## Pricing

**3 offers available**

| Vendor | Price |
|--------|-------|
| Shootingsurplus Com | $1203.46 |
| Buds Gun Shop | $1240.99 |
| Classicfirearms Com | $1275.03 |

## Similar Products

- [Sig Sauer M18 9mm 3.9in Black](https://gunsnation.com/p/sig-sauer-m18-9mm-3-9in-black/UCE3nOzzo)
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*Data from [GunsNation](https://gunsnation.com)*