Mil-Spec Fire Control Group includes: Investment Cast Hammer, CNC Machined, Heat Treated, Phosphated, Precision Ground Investment Cast Trigger, CNC Machined, Heat Treated, Phosphated, Precision Ground Stamped Disconnector, Precision Ground, Heat Treated, Phosphated 100% Made in the USA Available with a standard, stamped disconnector, or precision laser cut disconnector. Mfg: Critical Capabilities Llc