Package:

• Integrated Hop-up barrel
  
• Grub screws & allen key

Features:

• Aluminum Alloy Material (Barrel & Hop-up)
• Integrated Hop-Up allows to go through flash hider and outer barrel
• Outer diameter of main body 8.5 mm
• Outer diameter of hop-up front end 10mm
• Length of hop up front end 30mm
• Inner diameter 7.5mm
• Total length 50cm
• Compatiable with Double Bell/King Arms TW GBBR
  
• Perfect for 7.15-7.35mm gel ball