Maxx Model M4P Pro Hop Up Chamber - HPA Polarstar

The newest Maxx M4P Pro HopUp Chamber for HPA PolarStar Engines on standard M4/M16 platforms. The CNC Aluminum Hopup Chamber M4P Pro (with BB Latching System) blue unit is precisely made to improve accuracy and ensure consistent air seal for all HPA PolarStar Engines on standard M4/M16 platforms.  **The M4P unit is updated for 2022 and replaced the previous older red ME unit.  The M4P includes more precise improvements including accepting more hopup buckings (Maple Leaf is the best fit according to Maxx) and the highest FPS consistency with any hopup aftermarket chamber.  The ME was prone to more jams, which is eliminated with the new M4P unit. The Hopup Chamber M4P 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, Flat-Hop and Standard-Hop to keep the BBs shooting straight and accurate on every single shot.  The Hopup Chamber M4P unit is designed to accept the nozzle length on M4 HPA Polars