Description
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
