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I have recently bought a MKII TX which was noisy (not twangy, just loud) so I replaced the spring, bearings, piston seal and breech seal with original parts but this didn't cure the problem. On further inspection I've noticed the spring isn't a snug fit on the rear guide so as a temporary measure I made a sleeve to fit and this has made a massive improvement. I know all my replacement parts are original but although the rear guide looks original I can't be 100% sure. The diameter of the guide is 13.8mm and the ID of the spring is 14.3mm. Does anyone know if there are more than one size rear guide available from AA and what the correct diameter of the rear guides on these are please?
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