The design of the new Duty Line was driven by feedback from military and law enforcement operators. They wanted the patented Zero Creep Technology and proven stainless steel internals, but with a more tactile feel. To achieve this, they more than doubled the pull weight and length of the first stage. And after the zero creep break they engineered a much more forceful reset. The result? A totally different feel that offers more certainty with every shot. The Duty Line is TriggerTechs interpretation of what Mil-Spec should be. The AR Duty line is the latest in TriggerTech triggers that offers robust reliability without compromising performance. Inspired by active MIL / LE Operators these triggers offer a longer take up (on two-stages) and a more forceful reset. All pull weights and measurements are approximate. 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, they strongly suggest you retain the services of a competent professional gunsmith to install your trigger, and perform all important safety checks. Product Specifications Trigger Lever Type: Traditional Curved or Flat Straight Trigger Action: Two-Stage Zero Creep : Yes TKR Technology: Yes CLKR Technology: Yes FLTWR Technology: Yes Creep: 0.000" Overtravel: 0.060" Reset: 0.070" Reset Feel: Tactile mid force Hammer Strike Force: Full Pin Size: Standard Mil-Spec Pin 0.154" (trigger pins not included) Satisfaction Guarantee: 30 days Warranty: Product lifetime Weapon Platforms: AR-15 Housing: EZAC Diecast Key Components: 440C Stainless Steel PVD Black PVD stands for Physical Vapour Deposition. It is a hard and durable coating that is applied to external stainless components to give them a clean black color.