Do you guys watch "SIX" ? It's the best action TV series I've seen recently!! I assume you guys have already known where to find the best 416 like a NSWDG. HAO provide the most milsim experience for PTW user! The HAO 416V2 MUR kit include a standard Steel 10.4" barrel for milsim training and 10.4" Alloy + 4"/6" steel extension which offer you the flexibility in every action. Contact us for more intel!