Gen 2 Billet Upper Receiver Without Forward Assist (Not Pictured) 

10.5" 416R Stainless Steel Barrel

Heavy Contour

1:20 Twist

Pistol Length Gas System

.875 Standard Gas Block 

10" Handguard 

Thread Protector with Optional Muzzle Brake 

3/4x24 Thread 

Dual Charging Handle

BCG

*H2 weight buffer is recommended for the 450 Bushmaster