Built on decades of manufacturing and trigger building experience the Black Talon Tactical patent pending single stage calibrated adjustable drop in trigger system has the most accurate adjustable pull force system on the market for Sig Sauer MCX platform firearms. Fully adjustable and repeatable from 3.5lb-6lb utilizing a calibrated scale clearly laser etched on the trigger housing. All our triggers are individually calibrated to within 1 oz. pull force after assembly. Our Triggers have ZERO Take Up, .5MM Break Travel and 1.25MM MAX Over Travel. We build all our components in house from A2 tool steel core hardened to near 60 Rockwell C and 6061 Aircraft Aluminum hardened to the T6 temper. For the install of the adjustable trigger you will use the original MCX anti walk pins, once you have tighted down the set screws on the back of the trigger the pins will stay in place and will not move.