I want a 10.5 inch 450 pistol. Ive got a 50 beo 16 inch and its been a darned good gun but its on the heavy side. Problem is everyone seems to be pretty proud of there 450 and 50 beo pistol uppers. Easy to find a 556 or 9mm pistol upper for around 300 bucks but a 450 or 50beo is closer to a grand.