Shipping & Compliance
- This firearm must be transferred through a licensed Federal Firearms Licensee (FFL) and cannot be shipped directly to the buyer. This item cannot be shipped to Hawaii, Alaska, or U.S. territories (Puerto Rico, Guam, U.S. Virgin Islands, American Samoa, Northern Mariana Islands).
- Magazine capacity is restricted in certain states. We do not ship this item to states where its capacity exceeds the legal limit -- affected orders are blocked automatically at checkout.
The M400 SDI X‑Series pairs a 16‑inch chrome‑moly barrel (1:7 twist, threaded 1/2x28 with a hybrid compensator/flash hider) with SIG's 2‑Stage Matchlite Duo trigger, breaking crisp at 4.5‑6.5 pounds with a flat‑blade profile for genuinely precise trigger control. A 7075‑T6 aluminum receiver, free‑floating M‑LOK handguard, and Magpul SL‑K telescoping stock back a rifle built around real ergonomics, and fully ambidextrous controls -- bolt catch/release, selector, charging handle, and mag release -- mean it runs the same whether you're left- or right‑handed. SIG's own AR‑15 platform, built to the standard the company applies to its duty and military rifles.
M400 SDI 5.56MM 16" MOSS GRN RM400‑SDI‑16B‑MSGRN
- Model: M400 SDI XSeries
- Caliber/Gauge: 223 Rem | 5.56 NATO
- Action: Semi‑Auto
- Barrel Length: 16"
- Capacity: 30 + 1
- Finish: Moss Green Cerakote
- Overall Length: 36.5"
- Weight: 7 lbs.
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