Hop-Up Chamber for M4

Hop-Up Chamber for M4The Retro ARMS design is very similar to the recent MaxModel chamber design, but significantly more affordable and, in our opinion, with better finishes and higher quality. Hop Up chamber for M4 type replicas. Retro ARMS chambers feature components machined from CNC aluminum EN AW 2007 and EN AW 7075; the adjustment wheel is made of polypropylene. The adjustment mechanism is highly effective because the lever does not bend due to the materials used.

The Retro ARMS design is very similar to the recent MaxModel chamber design, but significantly more affordable and, in our opinion, with better finishes and higher quality.

Hop-Up chamber for M4-type replicas.

Retro ARMS chambers feature components machined from CNC aluminum EN AW 2007 and EN AW 7075; the adjustment wheel is made of polypropylene. The adjustment mechanism is highly effective because the lever does not bend due to the materials used. Its design allows precise adjustment within a 2 mm range with 0.01 mm increments.

The chamber is 100% compatible with Retro ARMS gearboxes, but also fits standard zinc gearboxes. However, please note we cannot guarantee absolute and perfect fit.

The Hop-Up chamber is equipped with an O-ring to prevent BB drop.

The Hop-Up protrusion is integrated into the pressure lever, ensuring it won't fall out during assembly/disassembly. Optional pressure levers are available for experimental setups.

The chamber surface is anodized in black and red.

Best value-for-quality ratio in our lineup.