The Wilson Combat Small Parts Kit for AR-15 is an essential item to have when building your own upper receiver. This kit contains all of the necessary parts and components to complete a mil-spec forged upper build. From charging handle, forward assist, ejection port door, and springs, this kit has it all! With this kit, you'll have everything you need to complete an AR-15 upper receiver build in no time. Parts Included: Mil-spec forged charging handle assembly Ejection port cover Ejection port cover roll pin and clip Ejection port cover spring Forward assist assembly Forward assist roll pin Forward assist spring