Complete CNC HopUp chamber M4P PRO HPA Polarstar M4 - MAXX

Complete CNC HopUp chamber M4P PRO HPA Polarstar M4 - MAXX

CNC Hop-Up Chamber M4P PRO HPA Polarstar M4 – MAXX is a fully CNC-machined aluminum hop-up chamber designed for standard M4/M16 rifles equipped with PolarStar HPA systems. Its precision manufacturing minimizes air leaks, improving shot consistency and overall performance. Hop-up pressure is adjusted via a rotary dial, allowing extremely fine and precise tuning. The chamber features a 4 mm pressure arm compatible with Standard-Hop and R-Hop buckings and supports most soft and hard hop-up rubbers without performance loss. A replaceable OD 11 mm inlet adapter ensures perfect alignment with the HPA nozzle, eliminating unwanted movement. The CNC barrel locking system securely holds the inner barrel in place and prevents rotation or wobble. Brass side plates assist with precise centering inside the outer barrel. A special BB retention system with a release lever prevents BBs from falling out when removing the magazine and allows controlled release when needed.

 
Features
– CNC machined aluminum hop-up chamber
– designed for PolarStar HPA systems on M4/M16 platforms
– rotary dial for fine hop-up pressure adjustment
– 4 mm pressure arm compatible with Standard-Hop and R-Hop
– compatible with most soft and hard hop-up buckings
– replaceable OD 11 mm inlet adapter
– CNC barrel locking system to prevent rotation and movement
– brass side plates for precise centering
– BB retention system with release lever
– overall length 51.15 mm
– overall height 37.75 mm
– inlet adapter outer diameter 11 mm
– cartridge outer diameter 12 mm
– cartridge inner diameter 8 mm
– feeder outer diameter 8.85 mm
– feeder length 6 mm
– compatible with most PolarStar HPA engines