[Roentengen]

I recently aquired a KJW Hi-Capa with an intermittent issue where the outer barrel is too far forward when the slide has returned. All parts are stock KJW and I believe the gun has been moderately gamed.

When the failure occurs it causes the outer barrel to protrude 2-3mm further than normal out the front of the slide and a simillar gap between the rear of the outer barrel and the opening of the slide. The slide is in the correct position and the friction between the outer barrel and the slide is sufficent to prevent the action from cycling. The next shot causes the remaining gas in the magazine to vent. It can be returned to the correct state by lightly striking the front of the outer barrel.

I examined the pistol in as much detail as my minimal experience allowed.

-There are no obvious areas of wear.
-When cycled manually it is smooth with no catching or sticking.
-The most obvious points of wear on the outer are the 2 points of contact where the bushing supports the barrel.
-The lugs on the slide have a little wear that has softened the corners and the grooves in the outer barrel appear to be square.
- the loading nozzle is lubed and moves freely. There are no marks indicating an impact with anything.


It happens intermittently when firing but can be reproduced reliably by using the slide release with the pistol pointed upwards. Mag in or out does not make a difference

Some of the fixes I have considered are

1. A new slide and/or outer barrel seems the most obvious possibility. Also potentially the most costly.

2. A stronger recoil spring. I'm unsure of this one.

3. Replace the barrel/Hop up combination.


Any assistance in solving this would be appreciated.

Thanks in advance