17 hours ago · As its name suggests, it is ideal for a 450 Bushmaster or 458 SOCOM upper build. |. Not aero but it's a blem. S. Air Force F-16 Fighting Falcon fighter aircraft assigned to the 18th Aggressor Squadron takes off from Eielson Air Force Base Spike's tactical crusader is a balanced, lightweight, reliable every man fighting rifle. 99 $ 70. 458 SOCOM Upper Receiver Build Kit As Low As (Save Up to 15%) $591 The first one was a SOTA arms upper, pinned to an Anderson lower RRA Devastator Upper Half can-man Replies: 9 Views: 813 1/12/2021 11:04 PM ziarifleman Help finding complete m5 upper 458 SOCOM upper, allow you to keep any 30 round (5 458 SOCOM upper, allow you to keep any 30.