Retro Arms CNC Hop Up Chamber AR15 PRO

Retro Arm's new variant of their hop chamber , the Pro series comes packed with modularity ! 

The all new Pro hop chamber comes with an adjustable bb feed tube which makes fitment with magazines a dream. 

What is included?

• CNC Hop Chamber 
• Adjustable BB Feed Tube 
• 5x Shims for Adjustable Feed Tube 
• Rotary Dial 
• 1x Flat Hop Arm
• 1x Flat Hop Nub 
• 1x M style Arm 
• C Clip 
• 3x o rings, Gearbox seal/Rotary Wheel/BB Feed tube retention 
• Threaded barrel collar 

Real Deal 21.1 Nozzle is recommended