Madbull Airsoft Ultimate 3-1 Hop Up Chamber

The MadBull Ultimate hop-up unit is a really innovative design for the M4/M16 series AEGs. It allows easy and precise hop-up adjustment do to the larger diameter wheel which has been relocated. The traditional style hop-up units with the small adjustment wheel on the side are usually either too hard to fine tune and rotate smoothly or too loose and vibrate loose and back off from your idea hop-up setting. This can be a real annoyance during game play. Ultimate hop-up units are fully compatible with the MadBull LED Tracer unit (optional) attachment which allows for a completely hidden tracer solution. Negating the need muzzle mounted tracer units or tracer magazines. 3 Functions in 1: (1) Tracer unit: You can attach a MadBull LED tracer unit on this Hopup unit. This is an optional accessory and will be available soon. (2) Chamber lock: With this new hop up design you will not have to worry about losing and dropping several bbs with a magazine change. This new design provides you with a