The SIG SAUER M400 SDI 10" M-LOK Handguard is a genuine factory replacement designed specifically for the SIG M400 SDI X and TREAD platforms, while maintaining full compatibility with standard AR-15 mil-spec builds. Machined from lightweight aluminum and finished in durable black anodizing, this free-float handguard improves accuracy by eliminating barrel contact during supported or rested shooting. Integrated M-LOK slots along the sides and bottom allow easy mounting of lights, grips, and accessories, while the M1913 Picatinny top rail supports optics and iron sights with a continuous, rigid mounting surface. Strategic lightening cuts reduce overall weight without sacrificing strength, keeping the rifle balanced and maneuverable. Whether you’re restoring a factory SIG rifle or upgrading a custom AR-15 build, this handguard delivers factory-correct fit, clean aesthetics, and proven performance. This kit includes the barrel nut, clamps, and installation hardware, making it a complete drop-in solution for compatible rifles. Key Features & Benefits Genuine SIG SAUER factory M400 SDI X handguard Free-float design improves accuracy and consistency M-LOK slots on sides and bottom for modular accessories M1913 Picatinny top rail for optics and sights Lightweight aluminum construction with lightening cuts Durable black anodized finish Complete kit includes barrel nut, clamps, and screws Compatible with standard AR-15 mil-spec platforms Included in the Box SIG SAUER M400 SDI 10" Handguard Barrel Nut Barrel Clamps (2) Mounting Screws Installation Hardware
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