Swap out parts one at a time until the issue improves or disappears. I would put money on the Guarder BBU or anything within that area being the issue.
Most of the time, the issue is the piston head has gotten loose to the point that it won't seal correctly, or the seal was never any good to begin with. That, or something is so off that not enough gas is entering the nozzle to let it kick the slide back.
In this order, I would look at:
- BBU (This probably messed everything up - what was wrong with stock?)
- Zero Hammer (Might be dragging or interfering with BBU)
- Hammer Spring (Might be affecting the hammer or installed wrong)
- Steel Barrel (It'd have to cycle really roughly to start short stroking that bad)
- Recoil Spring (+50% will not cause a short stroke- I'm running close to 175%)
As well WE parts are not 100% TM spec. Well, they are TM spec in theory, just horribly off in every dimension. Gives me fits trying to make parts work.
EDIT: Wait, do you have an E1 Timberwolf or WE Glock 17? I'm confused - your post name and your post differ.
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