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  • Brand: Maxx Model
  • Construction: 6061 Aluminum
  • Compatibility: For Most ICS CXP, CS4, EBB M4/M16 AEG Series Rifles
  • Color: Silver


  • Machined from a solid aircraft grade aluminum block with tight tolerances to provide better accuracy, and consistency, and durability
  • Precision rotary dial designed for fine hop-up adjustments
  • Re-engineered hop-up levers and nubs that work best with R-hop, flat-hop, and standard-hop to keep the BBs shooting straight and accurate on every single shot
  • Accepts nozzle lengths 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 hop-up unit is exactly centered, straight, and air tight
  • Compatible with any 12mm inner bore ICS AEG gearbox & HPA engine nozzle outlets
  • Specially designed with BB latching system to prevent dropping BBs after removing the magazine, manual opening to release BBs from inside hop-up chamber by hand

Package Includes: 1x CNC Aluminum Hop-up Chamber M4i Pro, 2x CNC Acrylic Side Cover, 2x CNC Brass 2.9mm Side Wing, 1x CNC Steel Pivot Pin, 1x CNC Aluminum Hop-up Lever, 1x CNC Aluminum Soft Round Nub, 1x CNC Aluminum Soft Flat Nub (4mm), 1x CNC Aluminum Hard Concave Nub (4mm), 3x Steel Nub Spring, 1x CNC Steel Spring Guide, 1x Steel Upper Compression Spring, 1x Steel Center Compression Spring, 1x CNC Delrin Locking C-Clip, 1x CNC Brass Barrel Spacer, 1x Brass Barrel Spacer Holder O-ring, 1x CNC Aluminum Rotary Dial Knob, 1x CNC Aluminum Inlet Adaptor, 1x CNC Brass Inlet Spacer