# NEMO Omen Mongoose 9mm 5.8in

**Brand:** NEMO Arms
**Category:** Handguns
**Caliber:** 9mm

## Specifications

- **Caliber:** 9mm
- **Barrel Length:** 5.8"
- **Finish:** QPQ Nitride
- **UPC:** 850021104054
- **SKU:** UCExppvTK

## Description

The NEMO Omen Mongoose is a 9mm AR-pattern pistol with a 5.8-inch steel barrel threaded 1/2x28. An SB Tactical FS1913 brace is mounted at the rear, giving it a pistol-caliber-carbine-style shooting stance while it stays classified as a pistol. The gun runs a short-recoil operating system and includes a 35-round magazine.

### Key Specifications
- **Brand:** NEMO
- **Model:** Omen Mongoose
- **Caliber:** 9mm
- **Action:** Semi Auto
- **Barrel Length:** 5.8 in
- **Capacity:** 35-round magazine included
- **Finish:** QPQ Nitride

### Detailed Features
- The barrel is threaded 1/2x28 for a suppressor or muzzle device.
- An SB Tactical FS1913 brace is fitted for a compact PCC-style shooting stance.
- The upper carries a Picatinny top rail, and the handguard is M-LOK compatible for optics and accessories.
- The safety selector and bolt catch/release are both ambidextrous.
- It ships with a Magpul MOE SL grip and a 35-round Magpul PMAG 35 EV9, a CZ Scorpion-pattern magazine.

## Frequently Asked Questions

**Q: What caliber is the NEMO Omen Mongoose?**

A: The Omen Mongoose is chambered in 9mm.

**Q: What is the barrel length of the NEMO Omen Mongoose?**

A: It has a 5.8-inch steel barrel threaded 1/2x28.

**Q: How many rounds does the NEMO Omen Mongoose hold?**

A: It ships with a 35-round Magpul PMAG 35 EV9 magazine.

**Q: Who makes the Omen Mongoose?**

A: The Omen Mongoose is made by NEMO Arms.

**Q: What type of firearm is the NEMO Omen Mongoose?**

A: It is a 9mm AR-pattern pistol running a short-recoil operating system, with a Picatinny top rail and M-LOK compatible handguard.

**Q: Is the NEMO Omen Mongoose threaded?**

A: Yes, the barrel is threaded 1/2x28.

**Q: Where can I buy the NEMO Omen Mongoose?**

A: Compare current vendor offers on this page.

## What Customers Say

*AI-generated insights from customer reviews*

Owners of AR-pattern 9mm pistols like the Omen Mongoose generally like that NEMO builds it on a well-supported operating platform rather than a proprietary design, which keeps parts and support easier to find. The QPQ nitride finish on this model gets called out favorably for corrosion resistance on a gun that sees a lot of handling.

Ergonomically, the brace and the M-LOK handguard let owners set the gun up close to how they run a full-size carbine, and that carryover in controls is a common point of praise. The ambidextrous safety and bolt release matter to left-handed shooters specifically, since braced pistols in this category don't always include them.

On value, buyers weigh the Mongoose against other 9mm AR pistols and note the barrel comes already threaded, which is one less aftermarket part to buy. Because it runs a CZ Scorpion-pattern magazine, owners also find spare magazines and aftermarket parts are easy to source.

## Pricing

**2 offers available**

| Vendor | Price |
|--------|-------|
| Shootingsurplus Com | $2485.33 |
| Buds Gun Shop | $2491.99 |

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