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Piston Stuck in the Back
I took the gearbox in my hk416 apart, intending to put in some new stuff, only to discover that the bushings I bought don't fit. I put it back together and set it aside for a few days, but just now I felt like doing a bit of shooting. About halfway through the second mag (150 or so shots), it stopped working. Picked it apart to discover that the piston is stuck to the rear. Now obviously I'll need to open the gearbox to find out exactly what I did wrong, but there's a pretty angry spring in there, and I'm unsure how to proceed. Any pointers? :???:
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