The Hopup Chamber MI unit has a precision rotary dial design for fine hopup adjustments, also re-engineered the hopup levers and concave nubs to work best with R-hop and Standard-Hop to keep the BBs shooting straight and accurate on every single shot.
The Hopup Chamber MI unit is designed to accept ICS stock nozzle, or nozzle length from 21.00mm to 21.25mm, and also fully compatible with stock bucking and most aftermarket soft and hard rubber bucking without losing FPS or dropping BBs.
The Hopup Chamber MI Housing is equipped with a new CNC Delrin Locking C-Clip design to hold barrel tight without wobbling and twisting, and 3 compression springs on top, at bottom and in center of housing to ensure the hopup unit is exactly centered, straight and air tight at all times when adapted to stock gear box or any V2 gear boxes with 11.5mm or 12mm inner bore.
More than that, the Hopup Chamber MI Pro unit is specially designed with BB Latching System to prevent dropping BBs after removing the magazine. The Latching System can be also manually opened to release BBs from inside hopup chamber by hand.
The Dual UV LED Boards and Module set is also included with this hopup chamber unit to glow BBs in the dark. Operating Voltage from 7VDC - 15VDC (2-4 cells LiPo, 6-13 cells NiCad).

***The Empty Magazine Detection Sensor and Electronic Switch Controller are optional add-ons to stop Motor/HPA firing when the magazine is empty. (Sold separately)
***Test results: FPS might be increased from 10FPS to 30FPS over stock setup. Please check your FPS!