Our upper parts kit includes the parts you need to assemble your AR15 Upper Receiver. Potomac Armory sources these kits from a variety of top tier firearms component companies to bring you the best, made in USA parts.
This is a somewhat generic kit. If you are looking for a specific kit for an M16A1 or other retro build, you should look for a set specific to your build.
Mil-Spec
Rock River Arms