This is a Windham Weaponry WW-15 semi-automatic AR-15 style rifle in .223 Remington (5.56 NATO) caliber. It has a 16.5" barrel, flat top receiver with picatinny rail, flat top picatinny gas block, 6-position buttstock, and Magpul flip-up sights. This rifle is in nice condition with a clean, bright bore. It comes with manual, sling, and one 30-round magazine.