# 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:** 798681744121
- **SKU:** UCE3nPCgr

## Description

The Sig Sauer M400 Forge is an AR-pattern semi-automatic rifle chambered in 5.56 NATO with a 16-inch barrel and 10+1 capacity. It ships with a ROMEO-MSR Gen II red dot optic already mounted, making it ready to use from the box. The receiver is black anodized alloy with a Picatinny rail and M-Lok handguard.

### Key Specifications
- **Brand**: Sig Sauer
- **Model**: M400 Forge
- **Caliber**: 5.56 NATO
- **Action**: Semi Auto
- **Capacity**: 10+1
- **Barrel Length**: 16 in
- **Color/Finish**: Black

### Detailed Features
- Ships with ROMEO-MSR Gen II red dot sight
- 16-inch barrel on an AR-pattern platform
- Black anodized alloy receiver with Picatinny rail
- M-Lok handguard for accessory mounting
- Magpul MOE stock and Shark Fin grip

## Frequently Asked Questions

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

A: The M400 Forge is chambered in 5.56 NATO.

**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 10+1 capacity.

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

A: Yes, it ships with a ROMEO-MSR Gen II red dot sight already mounted.

**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.*

> I can say this is not an entry level ar it might be entry level for sig and that's something to consider because sig rifles they do cost quite a bit.
>
> — [Copper Jacket TV](https://www.youtube.com/watch?v=4bWUoXJlwp4&t=80s)

> 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)

> I don't like it at all let me tell you why that's because this hand guard gets super freaking hot.
>
> — [Copper Jacket TV](https://www.youtube.com/watch?v=4bWUoXJlwp4&t=707s)

> A few mags through this a few 30 round mags through this you're probably going to need to put on gloves at some point because it just gets too hot to hold on to this thing.
>
> — [Copper Jacket TV](https://www.youtube.com/watch?v=4bWUoXJlwp4&t=750s)

> I would not steer anybody away from one of these whatsoever.
>
> — [Copper Jacket TV](https://www.youtube.com/watch?v=4bWUoXJlwp4&t=955s)

## What Customers Say

*AI-generated insights from customer reviews*

Owners of the M400 Forge point to the included ROMEO-MSR Gen II optic as the main draw, since it removes the need to budget separately for a red dot. Most find the package well-integrated out of the box, and the M-Lok handguard gets consistent praise for keeping the rifle lightweight while still allowing accessories.

Ergonomics feedback is generally positive. The Magpul MOE stock and Shark Fin grip work well for most shooters, though some prefer to swap the grip for something more traditional. The 16-inch barrel gives a solid balance between velocity and maneuverability for range use.

Value opinions split somewhat. Buyers who compare the M400 Forge against bare rifles in the same price range see it as a strong deal given the bundled optic. Those who already own glass or prefer a different red dot sometimes feel they are paying for hardware they will replace, which pushes perceived value down a notch.

## Pricing

**10 offers available**

| Vendor | Price |
|--------|-------|
| Brownells | $999.99 |
| Guns Com | $999.99 |
| Kygunco Com | $999.99 |
| Classicfirearms Com | $999.99 |
| Buds Gun Shop | $999.99 |
| Grabagun Com | $999.99 |
| Gritrsports Com | $999.99 |
| Centerfiresystems Com | $999.99 |
| Globalordnance Com | $1001.65 |
| Deguns | $1027.99 |

## Similar Products

- [SIG Sauer M400 Forge 5.56 NATO 16in Black](https://gunsnation.com/p/sig-sauer-m400-forge-5-56-nato-16in-black/UCE3nPCgk)
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*Data from [GunsNation](https://gunsnation.com)*