SIG Sauer M400 SDI X
SIG Sauer M400 SDI X 5.56 NATO 16in 30+1 Rifle
The SIG Sauer M400 SDI X is a direct-impingement, semi-automatic 5.56 NATO rifle built for high performance and ambidextrous operation. It features a 16 in chrome/moly steel barrel with a 1:7 twist rate, a free-float M-LOK handguard and a MIL-STD 1913 (Picatinny) top rail for mounting optics and accessories. The platform is fitted with fully ambidextrous controls and a multi-position telescoping buttstock.
Factory configurations ship with a single 30-round magazine and include SIG muzzle device(s). The M400 SDI X platform is described by SIG as a performance-oriented M400 variant suitable for professional/trainin…

Specifications
| UPC | 798681701216 |
|---|---|
| Brand | SIG Sauer |
| Model | M400 SDI X |
| Caliber | 5.56 NATO |
| Mfg Part Number | RM400-SDI-16B-MSGRN |
| Barrel Length | 16 in in |
| Capacity | 30+1 |
| Sights | None |
| Finish | Moss Green |
| Purpose 1 | Sport Shooting / Competition |
| Purpose 2 | Duty / Professional Use |
SIG Sauer is a prestigious firearms manufacturer known for its exceptional quality, precision engineering, and innovative designs. The company originated from a partnership between the Swiss company Schweizerische Industrie Gesellschaft (SIG) and the German firm J.P. Sauer & Sohn in 1985. This collaboration brought together Swiss precision and German engineering, creating firearms that quickly gained a reputation for reliability and excellence.
SIG Sauer's diverse product lineup includes pistols, rifles, and accessories that cater to a wide range of users, from military and law enforcement professionals to civilian enthusiasts. Notable models like the P320, P365, P226, and P938 have become synonymous with quality and performance. The P320, …
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