TM MWS auto jam

[maka]

My TM MWS jams when I use full auto but semi works perfectly. Full auto worked perfectly for the past 7 games.  The BB seems to get caught at the top above the barrel thus the bolt cannot close and discharges the air in the magazine.  The bolt seems normal and the shop can’t find what’s wrong.  Has anyone experienced this? 

Thanks

 

[Wo1f]

Does your nozzle still spring back nicely? And how does it cycle? If it’s inconsistent it could be picking up a second BB before firing the first

 

[Guest]

As I said on ZI, mine does the same in the cold, with a drum mag and green gas. The bolt and nozzle freeze and don’t cycle properly

 

[maka]

I'm playing indoors so temperature is not an issue.  Yes everything cycles nicely.  The nozzle looks good too.  When I rapid fire in semi it works perfectly but in auto it jams after the 2 or 3 round.