Battle Arms Development, Inc. is a design, research, and development firm focusing on small arms design including firearm components, tools, gauges, accessories, and complete weapon systems. All B.A.D. Inc. products are made in the U.S.A. and held to the highest manufacturing standards to exceed the expectations of the most demanding users.Features: Enhanced Ergonomic Pistol Grip Extended Bolt Catch Extended Safety Selector Complete Lower Parts KitIncludes: (1) Pistol grip (1) Pistol grip screw (1) Pistol grip lock washer (1) Hammer (1) Bolt catch (1) Disconnector (1) Trigger (1) Trigger guard (1) Magazine catch (1) Magazine catch button (1) Safety selector (1) Pivot pin (1) Takedown pin (1) Trigger pin & hammer pin (1) Buffer retainer (1) Bolt catch buffer (1) Bolt catch roll pin (1) Trigger guard roll pin (1) Selector detent (1) Takedown pin detent & pivot pin detent (1) Hammer spring (1) Trigger spring (1) Magazine catch spring (1) Buffer retainer spring (1) Takedown pin detent spring & pivot pin detent spring (1) Selector spring (1) Bolt catch spring (1) Disconnector spring