MAXX CNC Aluminum Hopup Chamber M4P - PRO V3 The compact version of the

The compact version of the ATP-LE features the same durability and reliability as its larger counterpart

Optional 1 Piece aluminum bolt simplifies the installation especially on guns where the cylinder head is pinned to the cylinder

Full length top rail allows for easy mounting of a wide variety of optics and other accessories

instruction manual

MAXX CNC Aluminum Hopup Chamber M4P - PRO V3 The compact version of theCNC Aluminum Hopup Chamber M4P Pro (with BB Latching System) unit is precisely machined to perform accurately and consistently with HPA PolarStar Engines on standard M4 M16 platform. The Hopup Chamber M4P unit is built with an aluminum Rotary Dial Knob for fine hopup adjustments, 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