# Sig Sauer M400 Forge 5.56 NATO 16in Concrete Gray

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

## Specifications

- **Caliber:** 5.56 NATO
- **Barrel Length:** 16"
- **UPC:** 798681744183
- **SKU:** UCE3nPChr

## Description

The Sig Sauer M400 Forge is a semi-automatic AR-pattern rifle chambered in 5.56 NATO with a 16-inch barrel and 30-round capacity. The alloy receiver is finished in Concrete Gray Cerakote and the handguard is M-Lok. It ships with a Magpul SL-K stock, black polymer grip, and the Sig ROMEO-MSR Gen II optic.

### Key Specifications
- **Brand**: Sig Sauer
- **Model**: M400 Forge
- **Caliber**: 5.56 NATO
- **Action**: Semi Auto
- **Capacity**: 30rd
- **Barrel Length**: 16in
- **Color/Finish**: Concrete Gray Cerakote

### Detailed Features
- 16-inch barrel on an alloy receiver with Concrete Gray Cerakote finish
- M-Lok handguard with Picatinny rail on top
- Magpul SL-K black polymer stock
- Black polymer grip
- Includes Sig ROMEO-MSR Gen II red dot optic

## Frequently Asked Questions

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

A: The Sig Sauer 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-style 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 ships with a 30-round capacity.

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

A: Yes, it includes the Sig ROMEO-MSR Gen II red dot optic.

**Q: What finish does the M400 Forge have?**

A: The alloy receiver is finished in Concrete Gray Cerakote.

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

A: Compare current vendor offers on this page.

## What Customers Say

*AI-generated insights from customer reviews*

Owners of the M400 Forge cite the Concrete Gray Cerakote finish as a practical choice that resists holster wear and gives the rifle a distinctive look without standing out. The M-Lok handguard layout gets consistent praise for allowing clean accessory placement without extra adapters.

The included ROMEO-MSR Gen II optic draws mixed reactions. Buyers who wanted a ready-to-shoot package see it as a value add, but experienced shooters who already have a preferred optic sometimes find the bundled red dot redundant. The Magpul SL-K stock is regarded as functional, and its adjustable length-of-pull covers a wide range of users, though a small number find the cheek weld lower than expected for optic use.

At its price tier, the M400 Forge is generally considered competitive with other optic-included AR packages. The common complaint is that the build quality, while solid, does not clearly exceed AR-pattern rifles in the same range that come without an optic. Reliability over standard 5.56 NATO ammunition is rarely questioned by owners.

## Pricing

**7 offers available**

| Vendor | Price |
|--------|-------|
| Kygunco Com | $1099.90 |
| Classicfirearms Com | $1099.99 |
| Buds Gun Shop | $1099.99 |
| Impactguns Com | $1099.99 |
| Grabagun Com | $1099.99 |
| Gritrsports Com | $1099.99 |
| Guns Com | $1119.99 |

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