The term "milspec" is thrown around a lot. 1005 Tactical has owned the actual milspec for countless parts for over 20 years. They supply the lower components to the Department of Defense as well as countless large name firearm companies. You will undoubtedly see these exact triggers sold by other companies for much more. Quality is unsurpassed and ISO (9001:2008) compliant. Simply put this is the best trigger on the market anywhere near this price point. The new 1005 Tactical 2-Stage Nickel Boron Trigger. With a 4.5 lb total pull weight and a durable Nickel Boron finish, this trigger ensures a smooth pull and crisp break every time you squeeze the trigger. The two stages of this trigger consist of an initial 2lb pull that brings you to a "wall", where the hammer and trigger are set to break for the shot. After that, it's only a 2.5 lb pull to fire, helping you to make accurate shots with short resets in between. Specifications & Features: Designed For All AR/M4 & PCC Type Rifles & Pistols 5.56mm & 9mm Firesarms Machined & Hardened Surfaces Milspec 8620 Tool Steel Trigger Milspec 8620 Tool Steel Hammer Proprietary NiB-X Nickel Boron Coating on Trigger & Hammer Milspec 7075 Disconnect 100% Pull Tested for Function 1st Stage 2-2.5lb 2nd Stage 2.5lb Meets Pull Weight Requirement For Most Law Enforcement Secondary Ground and Heat Treated All parts met with the strict A .0005a ^2 tolerances 100% Made in USA 100% American Made Quality All parts meet or exceed military specifications (Mil Spec) Components are 100% Made in the USA Quality packaging keeps components protected and organized Easy to Install Quick and easy installation, No special tools required. Parts Included: Nickel Boron Trigger Nickel Boron Hammer Disconnector Trigger Pin Hammer Pin Trigger spring Hammer spring Disconnector spring *FULL REFUND does not include shipping charges, meaning the shipping fees of sending and returning of the item.