This is the premium Ruger, Piston Driven, 16 inch threaded barrel, 6 position stock, aluminum quad rail forearm, metal Samson BUIS. Comes with 1 30rd P Mag and nice Ruger assault case. This rifle is NIB and will ship to FFL only. Please verify that it's legal for possession in your area. Best price on the internet. 1375.00 shipped in the lower 48.