CNC Hop Up Chamber AK

Hop-Up chamber for AK airsoft replicas. This Hop-Up chamber is manufactured from aircraft dural EN AW 7075, what have steel-like strength and weight of aluminum so it is best material for use. Chamber is milled on CNC milling machine and it also has protective anodizing of 5µm silver color (0,005mm).

Retro Arms built this Hop-Up chamber on results from testings, so this chamber is precise and custom-made constructed for best feeding and performance. They changed drill depth, so with 20,1 mm nozzle and Hop-Up 60 Shore bucking, they were able to get stable performance above 16m/s above spring power. Even feeding with heavy weight 0,43 BBs on SEMI and AUTO was without any problem.

For best setting of inner barrel, Retro Arms created new innovation on their Hop-Up chamber – the collet nut connection. It is placed in front of Hop-Up chamber. You will just install inner barrel with Hop-Up bucking into the chamber, seal it with clip lock and in the end, screw it together to Hop-Up chamber  with collet nut (you will need 10 mm key). The collet nut is manufactured from aircraft dural EN AW 7075 and after screwing, it will seal inner barrel very strongly. There is no need force for installing collet nut, only easy force, otherwise the inner barrel will overturn in the Hop-Up chamber. Sign of best sealing is reduction of space in the collet.

This Hop-Up chamber has best performance with the Retro Arms CNC gearbox V3, because these parts are constructed for best performance together. They are also constructed for screwing together, so they hold in straight line with inner barrel without any air leaks. You can also use this Hop-Up chamber with common casted ZnAl gearbox.

This Hop-Up package includes

• 1pcs Hop-Up chamber for AK (anodized, made from aircraft dural EN AW 7075)
• 1pcs Setting lever (anodized, made from aircraft dural EN AW 7075)
• 1pcs Pushing lever with cut for common spacers (anodized, made from aircraft dural EN AW 7075)
• 2pcs Screw M2,5 x 3mm (chemical black layout, steel material 12050)
• 1pcs Screw M3 x 12 mm (steel material with 8.8 strength, chemical black layout)
• 1pcs Plastic C-Clip lock for AK (ABS material)
• 1pcs Plastic pin (ABS material)
• 1pcs Rubber O ring (vulcanized rubber)
• 1pcs Collet nut (anodized, made from aircraft dural EN AW 7075)