The TriggerTech Competitive AR Primary Trigger is a non-adjustable trigger designed for enhancing the accuracy and precision of an AR for roles that consistently favor a lighter pull weight. Featuring Frictionless Release Technology™, this drop-in AR trigger has a short, two-stage action that provides a true zero-creep break, extremely short overtravel, a sub 0.030" tactical reset, and offers outstanding reliability even in the harshest environments. Due to there being truly zero creep, most shooters report the pull weights feeling ~0.5lbs lighter than a friction-based trigger of the same measured pull weight. The lower pull weight does not affect hammer force, so you can count on dependable primer strikes. As Frictionless Release Technology™ does not rely on coating, polishing, or lubricating the key engagement surfaces, trigger pulls will be more consistent from shot to shot. Intended Use: 3 Gun, competition, harsh environments operations, high speed shooting, long range hunting, precision shooting, target shooting, varmint huntingTriggerTech Trigger Control Details Trigger Lever Type: Curved Trigger Action: Short Two Stage Action, designed to feel like a 1911 Creep: 0.000" Overtravel: < 0.015" Reset: < 0.030" Reset Feel: Tactile mid force Hammer Strike Force: Full 1st Stage Weight: 0.75lbs 2nd Stage Weight: 2.75lbs Total Pull Weight: 3.5lbs Pin Size: Standard Mil-Spec Pin (0.154") Weapon Platform: AR 15 Rifle Housing: 7075 Anodized Aluminum Trigger: PVD Black (Physical Vapour Deposition) Download the installation manual here. Note: The installation guide is directed to experienced professional gunsmiths who understand the workings of their AR rifle and know how to fully detail strip the lower receiver. If you do not have these skills, it is strongly suggested that you retain the services of a competent professional gunsmith to install your trigger, and perform all important safety checks. Christensen Arms Trigger Tech AR15 Competitive Curved Blk/Blk Two Stage 3.5lb Trigger AR0-TBB-33-NNC