Test the gun without the cylinder assembly.
See if the gears run smoothly, and then see how semi auto cycles without a piston. If the cutoff lever or trigger assembly is having issues, you will be able to clearly see it like this. You can also feel the trigger sled reset when you release the trigger in semi. If you don't feel that then maybe that is the issue.
Did you recently change the spring or anything? This can happen if the spring has too many coils. This happened to me once last year in my M14, it was because the back of the piston was too big and was hitting the receiver, but that shouldn't happen in a V2 box. Check your piston for signs of jamming anyway.
|