For operators and responsible homeowners seeking a battle-proven semi-automatic rifle optimized for defensive roles, detailed knowledge of platform specifics matters. Balance, reliability, and parts commonality drive both performance and long-term value when selecting a tactical 5.56 system.

SIG SAUER SIGM400 is a preowned SIG SAUER SIGM400 in GOOD condition and comes as pictures. Key specs include 5.56 NATO caliber, a 16″ barrel, 30-round capacity, a dual-tone black & light brown finish, and an included Sig Sauer1023202-BEM scope. Priced at $1,399.99, this SIG SAUER SIGM400 delivers SIG Sauer pedigree in a ready-to-use configuration. Shop this product

Platform and Build: Why the SIG SAUER SIGM400 Matters

The SIG SAUER SIGM400 is built on a robust AR-style chassis with the familiar ergonomics and modularity tactical users expect. The 16″ barrel length provides a good compromise between maneuverability and velocity for 5.56 NATO, making it suitable for close-quarters defense and controlled-distance engagements. The 30-round capacity supports sustained follow-up without compromising handling.

Caliber and Ballistics

Chambered in 5.56 NATO, this SIG SAUER SIGM400 benefits from widely available ammunition choices, manageable recoil for rapid follow-up shots, and effective terminal performance inside standard defensive engagement ranges. The 16″ barrel preserves sufficient muzzle velocity for consistent ballistic performance while keeping the rifle nimble in tight spaces.

Optics and Accessories

The included Sig Sauer1023202-BEM scope gives this SIG SAUER SIGM400 immediate utility out of the box. That factory-supplied optic simplifies zeroing and reduces the need for aftermarket purchases, accelerating the transition from purchase to practical readiness. The black and light brown finish provides a low-profile tactical aesthetic useful for varied environments.

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Assessment and Buying Information

This SIG SAUER SIGM400 in GOOD preowned condition offers a practical balance of capability and value at $1,399.99. The combination of 5.56 NATO, a 16″ barrel, 30-round capacity, and the included Sig Sauer1023202-BEM optic makes it a strong choice for tactical-minded buyers who want a reliable defensive platform without extensive modification. Click through to confirm current inventory and the exact-as-pictured condition before purchase. Check current availability

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