# SIG Sauer M400 Forge 5.56 NATO 16in Black

**Brand:** SIG Sauer
**Category:** AR Style Rifles
**Caliber:** 5.56 NATO

## Specifications

- **Caliber:** 5.56 NATO
- **Barrel Length:** 16"
- **UPC:** 798681744114
- **SKU:** UCE3nPCgk

## Description

The SIG Sauer M400 Forge is a semi-auto AR-pattern rifle chambered in 5.56 NATO/.223 with a 16-inch barrel and a black anodized receiver. It ships with a Sig ROMEO MSR Gen II red dot optic, an M-LOK handguard, and a Magpul SL-K stock. Capacity is 30 rounds.

### Key Specifications
- **Brand**: SIG Sauer
- **Model**: M400 Forge
- **Caliber**: 5.56 NATO / .223
- **Action**: Semi Auto
- **Barrel Length**: 16 inches
- **Capacity**: 30rd
- **Color/Finish**: Black

### Detailed Features
- 16-inch barrel with black anodized receiver
- Picatinny top rail
- M-LOK handguard
- Magpul SL-K adjustable stock
- Includes Sig ROMEO MSR Gen II red dot optic

## Frequently Asked Questions

**Q: What caliber is the M400 Forge?**

A: The M400 Forge is chambered in 5.56 NATO/.223.

**Q: Who makes the M400 Forge?**

A: The M400 Forge is made by SIG Sauer.

**Q: What type of firearm is the M400 Forge?**

A: It is a semi-automatic AR-pattern rifle.

**Q: What is the barrel length of the M400 Forge?**

A: The barrel is 16 inches long.

**Q: How many rounds does the M400 Forge hold?**

A: It has a 30-round capacity.

**Q: Does the M400 Forge come with an optic?**

A: Yes, it ships with a Sig ROMEO MSR Gen II red dot optic.

**Q: Where can I buy the M400 Forge?**

A: Compare current vendor offers on this page.

## What Reviewers Say

*Quoted verbatim from YouTube reviews. Each link opens the video at the moment quoted.*

> This one suffers from having the thin barrel but I mean it comes with a red dot attached so this is yeah this is not a precision rifle.
>
> — [TFB TV](https://www.youtube.com/watch?v=5pjq8abiBL0&t=930s)

> If you're looking for a new AR-15 I'd say it's probably an okay recommend like you're not going to cry buying it you're not going to walk home disappointed.
>
> — [TFB TV](https://www.youtube.com/watch?v=5pjq8abiBL0&t=1024s)

> Daniel Defense is not going to have that same full ambi lower and I really have come to enjoy having that that little bolt drop on the right hand side.
>
> — [TFB TV](https://www.youtube.com/watch?v=5pjq8abiBL0&t=980s)

> We're definitely going to suppress it and you know suppress 16 inch guns are so 10 years ago.
>
> — [TFB TV](https://www.youtube.com/watch?v=5pjq8abiBL0&t=751s)

## What Customers Say

*AI-generated insights from customer reviews*

Owners of the M400 Forge frequently note the included ROMEO MSR Gen II optic as a genuine value add rather than a throwaway bundled sight. The M-LOK handguard and Magpul SL-K stock give it an out-of-the-box feel that doesn't require immediate upgrades, which is a common point of praise.

The AR-pattern controls and 16-inch barrel draw a straightforward assessment: the rifle runs reliably on a range of 5.56 and .223 loads, and the platform's parts interchangeability is a known advantage. Some owners note the SL-K stock feels slightly loose on the buffer tube and prefer to swap it for something with tighter tolerances.

Pricing relative to other optics-included AR packages is generally viewed as competitive, though buyers who already own quality optics sometimes feel they're paying for something they don't need. Build quality opinions are consistently positive, with the black anodized finish holding up through regular use.

## Pricing

**10 offers available**

| Vendor | Price |
|--------|-------|
| Gunbuyer Com | $999.99 |
| Brownells | $999.99 |
| Kygunco Com | $999.99 |
| Classicfirearms Com | $999.99 |
| Buds Gun Shop | $999.99 |
| Impactguns Com | $999.99 |
| Grabagun Com | $999.99 |
| Gritrsports Com | $999.99 |
| Globalordnance Com | $1001.65 |
| Guns Com | $1040.99 |

## Similar Products

- [Sig Sauer M400 Forge 5.56 NATO 16in Black](https://gunsnation.com/p/sig-sauer-m400-forge-5-56-nato-16in-black/UCE3nPCgr)
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*Data from [GunsNation](https://gunsnation.com)*