Pleyland85 Posted April 28, 2018 Share Posted April 28, 2018 Hi All, I’m assembling my King Arms hop up unit and I’m left with a small rubber o-ring and an extra spring. Does anyone know what these are for? Photo attached! Thanks Link to comment Share on other sites More sharing options...
Hudson Posted April 28, 2018 Share Posted April 28, 2018 The spring looks like it's the one that goes on the arm itself. Unsure about the O-ring, but I don't think it's essential. None I've used have ever had one. Link to comment Share on other sites More sharing options...
Pleyland85 Posted April 28, 2018 Author Share Posted April 28, 2018 Thanks! You’re right about the arm spring. Just the small o-ring I can’t figure out 🤔 Link to comment Share on other sites More sharing options...
Supporters Adolf Hamster Posted April 28, 2018 Supporters Share Posted April 28, 2018 isn't that o ring the one that goes on the end of the arm pin to stop it backing out? i lost mine but it's not much of an issue as once it's in the reciever the arm can't back out anyway. Link to comment Share on other sites More sharing options...
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