MAXX Model Airsoft CNC Aluminum Hop Up Chamber HPA Series MXW for MTW half finger indoor laser style shootouts or target Style:Desert Tan w Green Laser indoor laser style shootouts or target shoots with the Valken GB shooting cage Muzzle Velocity: ~370 FPS (Measured with 0 Billet and MTW 9 series Precision Rotary Dial Knob for fine hopup adjustments Re engineered the precision Hopup Lever and 4mm Bucking Nubs (6mm Bucking Nubs are optional) to perform best with R Hop and Standard Hop to keep the BB shooting accurately and consistently on every single shot Removable Steel Pivot Pin for ease of setup and maintenance Accepted the HPA MTW Engine M4 nozzle length Fully compatible with most aftermarket soft and hard rubber buckings without losing FPS or dropping BB during use Wisely equipped with a self centering inlet O ring to ensure the hopup unit is inserted exactly in the center of the 11mm inner bore HPA Engine nozzle outlet without wobbling Mounted the removable CNC Brass Side Wings to slide smoothly into the outer barrel slots Included an advanced CNC Delrin Locking C Clip to hold the inner barrel tight in place without wobbling and twisting Compatible with any 11mm to 11 Billet and MTW 9 series