VMP2 not locking back

[Nick G]

Evening all , anyone with experience of the VMP2 ? a friend has asked me to look over his and sort a couple of issues . I've fitted the Sabre reset arm which has dealt with an occasional venting issue . But It doesn't lock back on empty and I cant see any good reason why not .Except that with the upper fitted the bolt release 'wings' dont move fully out when an empty mag is inserted . I can't see anything obviously binding and the mag catch levers etc got a good lubing when the trigger pack was out for the reset lever.

Has anyone had experience with the same issue , and if so how did you fix it ?

 

[Darthwhite8]

My money would be on the gas pressure being too low (given the current bloody freezing temps!) have you tried warming the mags and/or using a winter gas

Assuming you have, mine struggled to lock back when the charging handle was loose, it turns out the very end of the charging handle catches a lip on the nozzle to pull it out of the hop chamber as part of the cycle, it could be something similar?

 

[Baser]

Not sure about the vmp2 but neither my WE SIG 226 or mates VFC Glock cycled properly last weekend, temp was3-6 deg C and they worked fine to start with but after a couple of hours they went bang but the slide didn’t travel enough to pick up the next BB. Going to try red gas to see if it fixes 2 GBB pistols that have worked perfectly this year.

 

[Nick G]

My money would be on the gas pressure being too low (given the current bloody freezing temps!) have you tried warming the mags and/or using a winter gas

Assuming you have, mine struggled to lock back when the charging handle was loose, it turns out the very end of the charging handle catches a lip on the nozzle to pull it out of the hop chamber as part of the cycle, it could be something similar?

Click to shrink...

Definitly not temperature related , it's been doing it all year aparantly . The charging handle / nozzle thing is interesting though , I'll look into that thanks.