RetroAmrs Hop-Up chamber for M4/M16 airsoft guns. The chamber has parts made on a CNC machining center from EN AW 2007 and EN AW 7075. The regulation wheel is made of polypropylene with glass fiber. The pressure of regulation is very precise, thanks to the used material there is no deflection of the pressure lever. The design of the pressure allows sensitive adjustment by 0.01 mm in the max range of 2 mm.
- O-ring to prevent bullets from falling out when the magazine is removed from the gun
- The pressure roller is integrated in the pressure lever, so it does not fall out during assembly/disassembly.
- The finish is decorative anodizing
The chamber fits best into RetroArms gearboxes, but it can also be used in classic ZnAl gearboxes. However, coaxiality and accuracy cannot be guaranteed as with CNC aluminium RetroArms gearboxes.
The RetroArms brand is based on the purely czech company Retro FACTORY s.r.o. Representatives of the company have experience with airsoft since 2001. In the beginning, the company was mainly a trading company, where the main activities were the design and commissioning of components for cooperation and assembly into functional units.
RetroArms does not compete with cheap chinese producers, but relies on the original design and high quality of manufactured parts.
Since 2013, it has a new production hall, CNC machine tools for machining complex components, a parts warehouse and a team of experienced workers and developers.