POF P-415 piston driven carbine. 16" fluted barrel,heat sink barrel nut, 1-7 twist with 5R rifling. P-9SX quad rail system. Vltor 6 position clubfoot stock. Vortex flash hider. Billet lower with ambidextrous bolt release and integral trigger guard. Flip up rear sight assembly and Knights Armament added and included. This rifle has all the latest and is 3rd generation lower. Test fired only. If you want a POF and don't want to wait 6 months for delivery then here you go. Feel free to email with any questions.