Other than enlarging the port from barrel to valve this is all you need to greatly improve performance of the Kral guns.
Power adjuster and barrel ported to 3/16" on both the .22/.25
Valve ported at an angle (20°)
.22 (5/32") = 30-35fpe
.25 (11/64 - 3/16") 45-60fpe
Kral Pro500 tune kit shown
Knight/Jumbo/SuperJumbo can't use an airstripper due to longer (full length of shroud) barrel.
Modified hammer to match factory Puncher Breaker specs.
2" OAL .059" wire diameter hammerspring with delrin spring guide (.25). .055" wire for (.22)
Smaller diameter delrin valve poppet/stem .375" OD
Airstripper (makes full shroud functional)
Instant performance increase and much more quiet with the functional shroud and debouce spring.
Power adjuster and barrel ported to 3/16" on both the .22/.25
Valve ported at an angle (20°)
.22 (5/32") = 30-35fpe
.25 (11/64 - 3/16") 45-60fpe
Kral Pro500 tune kit shown
Knight/Jumbo/SuperJumbo can't use an airstripper due to longer (full length of shroud) barrel.
Modified hammer to match factory Puncher Breaker specs.
2" OAL .059" wire diameter hammerspring with delrin spring guide (.25). .055" wire for (.22)
Smaller diameter delrin valve poppet/stem .375" OD
Airstripper (makes full shroud functional)
Instant performance increase and much more quiet with the functional shroud and debouce spring.
