5D Tactical is a firearms manufacturing company that provides high-quality 80% lower and upper receivers, build kits, tools, and accessories for firearms enthusiasts. They specialize in helping DIY gun-builders complete their favorite firearms in the comfort of their own shops. The company targets the most popular models of rifles, carbines, and pistols on the market, including AR-15, AR-9, and AR-308/AR-10 firearms. All that is needed to complete a gun from an 80% lower receiver is a router and drill, and 5D Tactical supplies the rest. The company is located in Sterling, Massachusetts, and comprises experts in the fields of firearms, mechanical design, manufacturing, and customer service.