Description
The Sig Sauer Tread Forward Grip Kit is a factory-sourced accessory kit designed for the M400 Tread rifle series, though its M-LOK mounting interface makes it compatible with any rifle that accepts M-LOK attachments. It is a practical choice for shooters who want a hand positioning solution that matches the original Tread build spec without piecing together components from separate sources.
The kit centers on a vertical forward grip and extends well beyond that single piece. Also included are a barricade stop, a hand stop, and both short and long M-LOK rail sections, along with the necessary M-LOK connectors and mounting hardware. That combination gives the shooter meaningful flexibility: the barricade stop lets you index off a barrier or rest position consistently, while the hand stop provides a reference point that prevents the support hand from sliding forward under rapid fire or stress. Having both long and short rail sections in the same package means you can configure the handguard surface to suit your support hand preference without sourcing additional panels separately.
Because this is a Sig Sauer factory kit rather than an aftermarket substitute, the components are built to the same interface tolerances as the M400 Tread platform. The polymer construction keeps added weight low, which matters if you are running a light carbine build and want to preserve that balance. Everything mounts directly to M-LOK slots with no adapter required, and the included hardware covers the full installation without a trip to the parts bin.




