Sig Sauer Tread M400 Two-Stage Flat Trigger Kit - 5 lbs Draw Weight for AR-15/M4/M400/MCX/516

The Sig Sauer Tread M400 Two-Stage Trigger Kit is a drop-in fire-control upgrade engineered to deliver a noticeably crisper, cleaner break on mil-spec AR-platform rifles. Built around a flat-faced two-stage design, this kit reduces the trigger pull to a consistent 5 lbs draw weight, giving shooters a more predictable and repeatable release for improved accuracy at the range or in the field.

Designed and assembled by Sig Sauer under the Tread accessory line, this trigger is built to install into standard AR-15/M4 lower receivers and is also rated for use in Sig Sauer M400, MCX, and 516 platforms. The flat-blade shoe gives a straight, consistent finger placement that many precision and duty shooters prefer over a curved factory trigger. The two-stage geometry provides a defined first stage of take-up followed by a short, clean second-stage break, helping the shooter manage the shot more deliberately.

The kit is intended as a direct replacement/upgrade for the factory trigger group and installs with standard AR-15 fire-control pins. Whether you are refreshing a duty carbine, dialing in a competition rifle, or simply tightening up a range AR, the Tread M400 two-stage flat trigger offers a tangible improvement in feel and break quality at an accessible price point.

Key Features:

• Two-stage flat-blade trigger design
• Approximately 5 lbs draw weight for a crisp, clean break
• Fits AR-15, M4, Sig Sauer M400, MCX, and 516 platforms
• Drop-in replacement for factory AR-15 fire control group
• Sig Sauer Tread branded accessory line