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5 mo. ago

  • Update: the headspace is closer to 0.4 mm, I guess I have to reinstall the shaft collars. Hope it was that

  • Thanks for the method, I’ll measure everything next weekend !

    Does it make any difference if I use a live round for the measurement (with the firing pin removed of course)? I find that dummy rounds don’t have very accurate dimensions.

    I also think I may need to reprint the upper and lower, as there is a gap between them that could potentially affect this issue in a way I don’t understand.

    I didn’t understand why the barrel needs to be pulled forward to take up the slack in the retainer when marking it.

  • If it’s a spring issue, does that mean I should use thicker wire? I’m not sure it would be compatible with the hammer.

    I didn’t notice any obvious friction at the hammer, but I can always lightly sand the edges more.

    I hadn’t considered headspace, but now that you mention it, I do feel like there’s some play with the barrel and the barrel retainer. Will print it again to see.

    Thanks for the tips !

  • Yes, it is.

    If it’s a friction issue, would it be more likely coming from the hammer then ?

    Yes, it happened several times with other cartridges from the same batch, but it seems very unlikely to me that the issue comes from the ammunition. They are factory ammo, not reloads or anything like that, so I find it hard to believe that an entire box could be defective 😅. The problem is definitely on my end.

    When you say sliding parts, do you mean the breech block in the upper? I don’t have any issues there it moves freely and chambers the round correctly every time.

  • Help & Support @forum.guncadindex.com

    What did I mess up on my Rogue-9 / Rebel-9?

    Hi!

    This is my first time posting on this forum, so I hope I’m in the right sub !

    I assembled a Rebel-9 using DIY components and during the test firing I experienced misfire. The round chamber and eject normally but there is no ignition.

    It looks like the firing pin I made is not impacting to the primer hard enough, or possibly that the firing pin is too short.

    However I don’t thinks this is a firing-pin length issue, as protrusion from the breech block exceeds 1.2 mm.

    The issue may be related to the hammer spring, although I followed the printed jig to make the springs with 1 mm piano wire.

    If anyone has insights or suggestions that could help me correct the issue, I would greatly appreciate it! :)