The Sig Sauer M400 ROSE is an AR-style rifle chambered in .223 Rem / 5.56 NATO, developed with input from competitive shooter Lena Miculek and the ROSE program. It pairs a 16-inch chrome-moly barrel with a thin 10-inch free-floating M-LOK handguard and a ROMEO5 Gen II red dot installed. Controls are ambidextrous and the rifle ships with two 10-round Magpul magazines and a Rose Savior soft-sided case.
Key Specifications
- The caliber is .223 Rem / 5.56 NATO.
- The barrel measures 16 inches and has a 1:7 twist rate.
- An installed optic is the ROMEO5 Gen II red dot.
- The handguard is a 10-inch free-floating M-LOK with ROSE engraving.
- The muzzle device is a hybrid compensator/flash hider (rose gold accents noted in product materials).
- The trigger is a SIG 2-Stage Matchlite Duo with a flat blade profile.
- The stock is a 6-position Magpul SL telescoping stock.
- Included magazines are (2) 10-round Magpul polymer magazines.
- Controls are ambidextrous (safety and mag release) for left- or right-handed use.
- Receivers finish and major components are black anodized aluminum with a chrome-moly steel barrel.
Packaged as a complete starter platform, the M400 ROSE combines user-focused ergonomics and curated components to simplify learning and range time. The ROSE-specific touches—trimmed controls, a compact M-LOK handguard with ROSE engraving, and an installed ROMEO5 optic—make this rifle ready for training, instruction, and general range use. The included soft-sided Savior bag and dummy rounds add convenient storage and handling tools for new owners expanding their skillset.
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