# Sig Sauer M400 Forge 5.56 NATO 16in Black CA

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

## Specifications

- **Caliber:** 5.56 NATO
- **Barrel Length:** 16"
- **UPC:** 798681744138
- **SKU:** UCE3nPCh8

## 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. This variant is California-compliant and includes a ROMEO-MSR Gen II red dot, M-Lok handguard, Picatinny rail, black anodized alloy receiver, Magpul MOE stock, and Shark Fin grip.

### 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
- California-compliant configuration with Shark Fin grip
- Ships with ROMEO-MSR Gen II red dot sight
- Black anodized alloy receiver with Picatinny rail
- M-Lok handguard for accessory mounting
- Magpul MOE Black Polymer stock

## 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 an AR-pattern semi-automatic rifle.

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

A: The M400 Forge has a 16-inch barrel.

**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, this variant ships with a ROMEO-MSR Gen II red dot sight included.

**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 in restricted states pick up the CA-compliant M400 Forge because it checks the required boxes while still coming with the ROMEO-MSR Gen II red dot included. Most appreciate not having to hunt for a separate compliant configuration on top of sourcing glass.

The Shark Fin grip that makes this CA-compliant draws the most discussion. Shooters accustomed to traditional pistol grips find it awkward at first and report a brief adjustment period. Those who spend time with it often find it usable for range sessions, but swapping to a standard grip (where legally permitted) remains a common first modification.

The M400 Forge platform itself is well-regarded for reliability and build quality. The Magpul MOE stock and M-Lok handguard are familiar components that most owners are comfortable with, and the rifle is seen as a capable baseline for those who want to add accessories over time.

## Pricing

**8 offers available**

| Vendor | Price |
|--------|-------|
| 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 |

## Similar Products

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