Hop-Up chamber for M60/PKM - (CNC made) Precision Type - moRRisCZ

- successfully tested in combination with 30 and more types of hop-up rubbers (Falcon, Systema, A +, CA, AT, GD, MB, Element, RA, Guru, ICS, GP, MapleLeaf, JBU, PDI, SHS… from each manufacturer in all available hardnesses) - in most cases tests achieved a power exceeding the spring force by 10 m / s and higher (without sealing the chamber and further tuning)
- recommended nozzle length 21.4-22 mm (depending on the internal configuration of the gearbox - feeder arm, cylinder head, piston wheel cams ensuring a higher nozzle stroke…) - optimal length 21.7 mm
- when mounting in PKM weapons, the pin fixing the chamber in the torsion may be too wide, it is necessary to slightly grind or remove it (chamber is basically axially secured by the seat itself in the outer barrel (barrel housing)

main advantages of the product:
- high quality and accuracy of production, used strength dural 7075 T6 (not anodized to maintain high production tolerances and sufficient surface hardness)
- Sophisticated inner shape for the hop-up rubber collar
- fixation of the inner barrel by means of 4 blunt screws (in contrast to the standard fixation by means of a lock, it allows axial displacement of the barrel - better seating of the hop-up rubber and slight axial correction of the barrel)
- adjusted position and size of bb feed hole (higher compatibility)

The hop-up chamber allows individual settings, which can help to eliminate production inaccuracies of some parts and weapons of Chinese production and brings a few user benefits:

    possibility to define the clearance of the chamber in the gearbox using the enclosed o-rings (2 different sizes)
    removable pin securing the chamber in torsion (for removal it is enough to heat it with a hot air gun or hair dryer) - for some PKM it is necessary to remove or adjust the pin, see above
    3 pcs of pressure rollers (various lengths 4.2-4.7 mm)