SIG M400 SDI X 5.56 NATO 16" Rifle Moss Green
$1,641.18
9 in stock
Also available in:
SIG's M400 SDI X delivers ambidextrous controls, a 2-stage trigger, and mid-length gas system in a 16" 5.56 NATO platform. Includes 30-round magazine and Magpul stock.
FFL
1
SIG M400 SDI X: Purpose-Built Performance
The M400 SDI X represents SIG's commitment to creating a rifle that meets the highest standards of performance and reliability. This 5.56 NATO platform is engineered for shooters who demand both precision and practicality.
Key Features
Controls & Ergonomics
- Fully ambidextrous controls: safety, charging handle, bolt catch, and magazine release
- Reduced angle grip for natural hand positioning
- Forward assist for positive bolt closure
Trigger & Accuracy
- SIG 2-Stage Matchlite Duo trigger with flat trigger shoe
- Free-floating M-LOK handguard for consistent accuracy
- Optics-ready receiver with no iron sights—designed for modern optics
Mechanical Reliability
- Mid-length direct impingement operating system
- Chrome-moly steel barrel with 1:7 twist rate
- 1/2-28 tpi threaded muzzle with SIG Flash Hider-Compensator
Furniture & Finish
- 6-position Magpul MOE-SL stock for length-of-pull adjustment
- M-LOK Moss Green Cerakote handguard
- Moss Green Cerakote receiver finish
- Includes one 30-round AR-15 polymer magazine
Specifications
- Caliber: 5.56 NATO
- Barrel Length: 16 inches
- Overall Length: 36.5 inches (extended) / 33.25 inches (collapsed)
- Weight: 7 pounds
- Accessory Rail: M-LOK and Picatinny compatible
The M400 SDI X is an excellent choice for shooters seeking a modern, reliable rifle with professional-grade controls and proven performance.
Features
- aluminum mlok handguard
- sig flash hider compensator
- sig 2-stage matchlite duo
Attributes
Action:
Semi-Automatic
Barrel Description:
Threaded
Barrel Length:
16"
Caliber:
.223 Remington
Caliber:
5.56x45mm NATO
Capacity:
30+1
Features:
N/A
Finish:
Applied Finish
Finish:
Moss Green Cerakote
Grip Type:
6-Position Magpul MOE-SL Stock, Black
Grips:
black magpul moe-sl stock
Hand:
Ambidextrous
Included Accessories:
None
Magazine Type:
30rd Polymer Magazine
Model:
M400 SDI Xseries
Model Series:
SIG M400
Muzzle:
Flash Hider
Overall Length:
33.25" - 36.50"
Overall Length:
36.50"
Receiver Material:
Aluminum
Safety:
Ambidextrous
Safety:
Lever
Sights:
None
Stock:
Magpul MOE SL 6-Position
Stock Description:
Magpul MOE SL
Stock Finish Group:
Black
Thread Pattern:
1/2"-28
Trigger:
Two Stage Matchlite Duo
Twist Rate:
1:7
Weight:
7 lbs
