The MadBull Ultimate Hopup was released today:

There is a story behind this product.

One of Airsoft players feed me his idea, the Chamber Lock idea.

We think that is very interesting and we put into our Hopup design. His name is Brian Holt. We will definitely give him a share (if this design is profitable~)
So, if you think you are smart enough, you can feed us your idea. We can’t guarantee that we will use your idea but once we adopt it, we will share our profit with you. (again, if this item is profitable.)

Features:

Including a Tracer LED Unit (Optional, Sold separately), Chamber Lock, and Easy Adjustment Device.

(1) The LED Tracer Unit: You can buy it separately and attached to the Hopup unit. Use your AEG battery and connect to your Tracer Unit. The LED can brighten the tracer BB when BBs are in the chamber.

(2) Chamber Lock: Designed by Brian Holt. With this new hop up design you will not have to worry about losing and dropping several bb’s with a magazine change. This new design provides  you with a way to keep bb’s in your AEG and ready to use and not on the floor and even better it stabilizes the top of the magazine to ensure a secure and flawless feed of bb’s into the AEG.

CAUTION: This hop up unit is designed for the experienced and responsible Airsoft player. With the magazine removed the AEG is still able to fire several bb’s.  Always wear safety goggles and treat all Airsoft weapons as if they were loaded.

(3) Easy Adjustment Wheel device: Use TM G36 style adjustment device and apply on the M4/AR unit.

Detail photos, please check our website. (MadBull)