Guntec AR-15 Upper Receiver Assembly Kit Features The Guntec USA AR-15 Upper Receiver Assembly Kit covers the essential small parts an AR-15 upper needs to function short of the bolt carrier group. The trap door assembly keeps the stock s storage compartment secured and spring-loaded for quick access to small spare parts. The forward assist assembly lets the shooter manually seat the bolt fully into battery if it hangs up on a dirty or out-of-spec chamber which matters when reliability counts. Rounding out the kit the 5.56 charging handle provides the leverage needed to chamber a round or clear a stoppage. Built in the USA this kit is aimed at builders finishing an upper receiver from parts rather than buying a complete assembly. Supplying the trap door forward assist and charging handle together saves the hassle of sourcing three separate small parts from three separate listings. Each piece is sized to drop into a standard AR-15 upper making this a straightforward addition to a build in progress. For hobbyists and armorers alike this kit is a practical no-frills way to keep an AR-15 build moving forward. Guntec AR-15 Upper Receiver Assembly Kit Specifications Manufacturer: GunTec Model: AR-15 Upper Receiver Assembly Kit Type: AR15 Upper Parts Kit Includes: Trap Door Assembly Forward Assist Assembly 5.56 Charging Handle Without Bolt Carrier Group Color: Black Material: Varies Country of Origin: Made in the USA Available At: GrabAGun