Maxx Model CNC Aluminum Hop-up Unit for M4 (M4A-PRO)

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Precisely machined to perform accurately and consistently on Tokyo Marui (include G&G, KRYTAC, except KWA) Standard M4/M16 standard AEG version 2 gear box
Machined from a solid aircraft aluminum block with tight tolerances to provide better accuracy, consistency, and durability
Precision rotary dial design for fine hopup adjustments
Re-engineered the hopup levers and nubs to work best with R-hop, Flat-Hop and Standard-Hop to keep the BBs shooting straight and accurate on every single shot
Accepts nozzle length from 21.00mm to 21.25mm
Fully compatible with most aftermarket soft and hard rubber bucking without losing FPS or dropping BBs
Equipped with a new CNC Delrin Locking C-Clip design to hold barrel tight without wobbling and twisting, 3 compression springs on top, at bottom and in center of housing to ensure the hopup unit is exactly centered, straight and air tight
Compatible with any 11mm inner bore AEG Gearbox/HPA Engine nozzle outlets
Specially designed with BB Latching System to prevent dropping BBs after removing the magazine, Manually opened to release BBs from inside hopup chamber by hand
Overall Length: 51.65mm
Overall Height: 37.75mm
Inlet Adaptor Outer Diameter (to fit into Gear Box): 11mm
Hub Outer Diameter (to fit into Outer Barrel): 12mm
Hub Inner Diameter (to fit Nozzle): 8mm
Feeder Outer Diameter (to fit magazine): 8.85mm
Feeder Length (to fit magazine): 6mm

Hopup Kit Includes: