One Horse Ar15 Complete Upper 16in 5.56 Nato. 56 Nato. These AR15 Upper Receivers through the expert product professionals at One Horse are made working with long lasting and dependable resources to be able to provide you with product which is going to be useful for quite some time. Manufactured utilizing some of the best attainable materials and design these special AR15 Upper Receivers from the product experts at One Horse will last you an unbelievably long time. One Horse has been making high-quality merchandise for a very long time and the One Horse Ar15 Complete Upper 16" 5.56 Nato is their way of demonstrating exactly how much they are concerned. Here at OpticsPlanet we make it our responsibility to obtain the best product for your needs and showcasing the One Horse Ar15 Complete Upper 16" 5.56 Nato is a thing that we are pleased to offer. Specifications for One Horse Ar15 Complete Upper 16" 5.56 Nato: Manufacturer: One Horse Caliber: .223 Remington Barrel Length: 16 in Finish: Matte Color: Black Additional Features: 1-7in. Twist Dimensions: 3.15 X 3.25 X 25.65 mm Length: 25.63 in Width: 3.25 in Package Contents: One Horse Ar15 Complete Upper 16" 5.56 Nato