Trigger Guard and Pistol GripTriggerguard assembly-Enhanced Polymer Winter Trigger Guard, secures with roll pin and set screw for easy installation (allen wrench not included)Triggerguard roll pinA2 Pistol grip-Injection Molded Glass Filled NylonPistol grip screwGrip screw lock washer-Stainless SteelFire Control GroupHammer- Investment Cast and Precision Machined Steel, Magnesium Phosphate Coating.Hammer Spring- Black Oxide CoatedTrigger- Investment Cast and Precision Machined Steel, Magnesium Phosphate Coating.Trigger Spring- Black Oxide CoatedDisconnector- Fine Blank and Precision Machined Black OxideDisconnector Spring-Black Oxide CoatedSafety selector- Investment Cast and Precision Machined Steel, Magnesium Phosphate Coating.Selector detent spring-Black Oxide CoatedSafety selector detent-Melonite Coated SteelMagazine Catch AssemblyMagazine release button-Anodized AluminumMagazine catch-Melonite Coated SteelMagazine catch spring-Black Oxide CoatedBuffer Retainer AssemblyBuffer retainer-Melonite Coated SteelBuffer retainer spring-Black Oxide CoatedBolt Catch AssemblyBolt catch- Investment Cast, Magnesium Phosphate Coating.Bolt catch plunger-Melonite Coated SteelBolt catch spring-Black Oxide CoatedBolt catch roll pinTake Down/Pivot Pin AssembliesTakedown pin detent springs (2)-Black Oxide Coated, longer than standard trim to length needed for your lower.Takedown pin detents (2)-Melonite Coated SteelTakedown pin-Melonite Coated SteelPivot pin-Melonite Coated Steel