TNTE Sales Inc. is Firefighter and family operated. We have been open for business since 2011. All TNTE Sales Inc. uppers are custom built using exacting tolerances by highly trained armorers. Your receiver and barrel are torqued to a spec of 55-65 +/- for best accuracy. All uppers are checked for proper head-spacing, and test fired to ensure reliability. We use only the highest quality US made components in your build. We will not use anything in your build we would not use ourselves.