Quote:
Originally Posted by lurkingknight
in some V2s the buffer tube screw is integral to the spring guide staying in place. Other v2s have a screw that just tightens into the back of the gearbox that keeps the guide in place.
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I got this too on some of my gearbox, the spring guide is probably stabilised by the buffer tube screw. Just test it with the buffer tube screwed in. I use ball bearing in all y AEG and never had a problem of piston not stroking well.
Also gearboxes are build to withstand springs with various lenghts, for exemple you could expect a unwinded M90 to be shorter in size thant a m120, even if there is other factors as how rigid is the spring if it's linear or non-linar pitch and so on.