J9 spring goes back in after fire cycle

hi there, recently re-modded my j9 (better seal on the end of the nozzle(, but when testing the gearbox after 1 shot it seems to pull the spring back about half now instead of returning to normal. any idea what causes this? As a result single fire barely works and a gel poops out, full auto seems good but and of the firing you here the spring go back a little.

Possible that the anti reverse latch isn’t installed properly or it’s spring has let go.

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i hope so, thats an easy fix if it is.

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you were spot on, the spring had moved a little on reverse latch and was not sitting right. shes all sweet now

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Awesome mate had the same thing to a mate’s ACR.

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