The AXIOM 2011 Flat Trigger Kit drops into your ACE VR handset and gives you a true 2011 flat trigger feel with a full tuning system built in. Pick the trigger reach that matches your finger length, install the included tuned sear, and you have a crisp, competition-ready trigger out of the box. Want to push it further? The kit includes everything you need to tune sear engagement, spring weight, and pull tension to your exact preference. Compatible with ACE VR handsets: Staccato P, Staccato HD P4, TTI Sand Viper, and Springfield 1911. What's in the box: 1x Flat Trigger in your chosen reach size (Extra Short, Short, Medium, Long, or Staccato Flat) 1x Rear CAM (Lifter) matched to the trigger 1x Tuned Sear with spring and sear pin (drop-in ready) 2x Blank Sears for custom tuning Sandpaper for sear shaping 3x Springs (Red heavy, Yellow medium, White light) 2x Spring tension caps for fine-tuning pull weight Pick your size by index finger length (measured from base knuckle to fingertip): Extra Short: under 2.75" Short: 2.75" to 3.0" Medium: 3.0" to 3.25" Long: 3.25" and up Staccato Flat: classic 2011 flat profile, fits most shooters Tuning system. Start with the pre-tuned sear for a ready-to-shoot setup. When you want a custom feel, shape one of the blank sears with the included sandpaper to dial in your exact wall and break. Swap between the three springs to set pull weight, and add the tension caps to fine-tune between weights. Backed by the CT3D Studio Lifetime Warranty.