The Sig Sauer M400 Tread Black Two-Stage Trigger Upgrade Kit with Match Flat Blade Trigger is designed to enhance the performance of your M400 Tread rifle. This premium trigger kit reduces the weight of the pull to break crisp and clean at approximately 5 pounds, providing better control and accuracy. The flat blade design offers a comfortable and consistent trigger pull, making it ideal for precision shooting. This upgrade kit is compatible with any M4/AR-15, M400, MCX, and 516 models, ensuring versatility and ease of installation. The high-quality construction ensures durability and reliability, making it a valuable addition to your firearm. Sig Sauer M400 Tread Black Two-Stage Trigger Upgrade Kit w/Match Flat Blade Trigger 8900696