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SIG SAUER M400, 5.56 NATO, RIFLE, 16IN, FORGE, BLK, SEMI, ROMEO-MSR GEN II, TELE STOCK, AL MLOK HG, (1) 30RD MAG
$999.99
- Ships in 24-48 hoursMon-Fri, once payment clears and the FFL is on file
- Licensed FFL & Class III dealerSuppressors and NFA items handled in-house
- Local pickup available2801 New Butler Rd, New Castle PA
- Shipping includes insuranceInsurance and handling are covered
Description
The SIGM400 5.56 NATO rifle combines a 16 in barrel platform with a modern Romeo-MSR Gen II optic setup, a telescoping stock, and an AL M-LOK handguard to deliver a compact, ready-to-mount configuration for precision aiming and fast target acquisition.
Key Features
- Caliber: 5.56 NATO
- Action: Semi-automatic
- Barrel length: 16 in
- Finish/color: Black
- Optics compatibility: Romeo-MSR Gen II
- Stock: Telescoping
- Handguard system: AL M-LOK HG
- Magazine included: (1) 30 rd mag
Specifications
- Product name: SIGM400
- Firearm type: Rifle
- Barrel profile/length designation: 16IN
- Upper/forging designation: FORGE
- Model designation: ROMEO-MSR GEN II
- Accessory designation: TELE STOCK
- Handguard designation: AL MLOK HG
- Magazine capacity: 30 rounds
Benefits
- Integrated optic-ready configuration: Supports a Romeo-MSR Gen II mounting arrangement for an established sighting system.
- Compact 16 in form factor: Optimized proportions for maneuvering while maintaining a rifle-length barrel.
- Telescoping stock: Provides adjustable length-of-pull for consistent shoulder fit.
- M-LOK handguard interface: Enables mounting of compatible accessories along the handguard for organized setup.
Use Cases
- Range sessions requiring a 5.56 NATO semi-automatic rifle with a 16 in barrel
- Training that benefits from a telescoping stock and an optic-mounted layout
- Target work using a 30 rd magazine for extended strings
Why Choose SIGM400
The SIGM400 is specified with a 16 in 5.56 NATO semi-automatic rifle build, a Romeo-MSR Gen II optic configuration, an adjustable telescoping stock, and an AL M-LOK handguard, packaged with a 30 rd magazine in a black finish for a cohesive, assembled configuration.
Specifications
| Manufacturer | Sig Sauer |
| Model | M400 |
| UPC | 798681744114 |
| SKU | RM400556N16BFORGE |
| Width | 11.4000 |
| Length | 46.4000 |
| Height | 4.3000 |
| Weight | 9.7000 |
| Caliber | 223 Remington/5.56 NATO |
| Capacity | 30 + 1 |
| Barrel Length | 16" |
| Sights | Optics Ready |
| Accessories | Romeo MSR Gen2 |
| Finish | Black |
| Grip Type | Polymer |
| Magazine | 1 30 rd. |
| Series | Forge |
| Stock Description | Magpul SL-K |
| Stock Finish | Black |
| Stock Finish Group | Black |
| Stock Material | Polymer |
| Trigger | TriggerTech Two Stage |
| Twist | 1:7" |
| Weight | 6.80 lbs |
| Width | 2.70" |
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