The ACE Trigger System completely reimagines Glock trigger mechanics by eliminating the parasitic movements that plague standard designs. Key Design Innovations: Separate Disconnect Module and Sear Module - not a one-piece connector True pivoting firing pin safety eliminates grit and drag Patented Zero Creep Technology(TM) for an exceptionally crisp break CLKR Technology(TM) lets you fine-tune pull weight with precision and confidence The ACE Trigger System includes three modular components: Lever Module Sear Module (with CLKR Technology(TM)) Disconnect Module Customize to your liking: Ships with heavy lever take-up spring pre-installed Includes light take-up spring and plunger safety spring Combine spring sets and use the CLKR screw to dial in your ideal feel and set your pull weight between 2.5-6.0 lbs. Performance without compromise. After three years of development, we're proud to introduce the patented Enveloped Lever Safety No blade. No compromise. The entire lever acts as the safety, delivering the feel of a solid monolithic trigger face - without sacrificing function. What's Included Competitive Special ACE Trigger System (3 Modules) Light + Heavy Lever Take-Up Springs Light Safety Plunger Spring