FX Wildcat mk3

[SandmannGermany]

Ist mir bis jetzt noch nie aufgefallen, aber ist es normal das hinten Luft aus dem Lauf kommt wenn kein Magazin drin ist???

 

[starlingassn]

if air comes out when you fire,
it probably needs a new breech o ring.

 

[SandmannGermany]

said when the shot was empty.
and where exactly is the seal not found. or do you mean this one

 

[bigmike]

It’s in the bore of the transfer port end where the probe pushes the pellet in. There should be a o’ring right before the transfer port that seals around the probe.
If there is a empty o’ring groove then you are missing the o’ring or it may be damaged.

 

[Glem.Chally]

Inside the brass piece in your picture there is an O-ring.

 

[tor47]

My newest gun, a wildcat mk3 bt, leaked at the breach O-ring when fired. It turned out there where some brass turning chips left in the grove, under the O-ring. The way I diagnosed the problem was that I tried a barrel from one of the other FX guns I have, which worked fine, no blowback. When I took the O-ring out, I noticed there was brass chips left in the grove, when I swapped it with a cotton tip. Blowed the grove clean with a shop compressor, and put in a spare O-ring I had, and everything was working fine. Guess one employee at the FX factory, had not cleaned the grove properly.

 

[corny]

Nope, not normal.
Check the breech oring inside the barrel. Then the orings outside of the barrel on the brass piece

 

[SandmannGermany]

thanks, people
found the problem.
now waiting for the replacement O rings.
I turned the damaged one on the barrel until I had at least these results. The one with 823 FPS is in front of it.
I'm now at a good 912 FPS.
I'll report back once I've used the new ones.

 

[tor47]

Should be an easy fix Maybe you shold put some tiny amount lube on the new O-ring, so you do not damage it