pintail Posted February 3, 2017 Report Share Posted February 3, 2017 ive had a mk60 from new about 7years ago, on cleaning im finding slight pitting of the barrells abot 5'' away from the breech, is this normal wear and tear ? ive put about 8000 shells thu it, would appreciate any replys, thanks. Quote Link to comment Share on other sites More sharing options...
Bobba Posted February 3, 2017 Report Share Posted February 3, 2017 I've one in 20 bore for about the same timeframe. Not put as many rounds through it as you. Both barrels.are as clean as a whistle. Quote Link to comment Share on other sites More sharing options...
welshwarrior Posted February 3, 2017 Report Share Posted February 3, 2017 Is it pitting or lead and plastic build up? Mirokus do suffer a bit with rust Quote Link to comment Share on other sites More sharing options...
pintail Posted February 3, 2017 Author Report Share Posted February 3, 2017 i thought it could be plastic build up but have used solvent and wire brush and can see the small pitting still there, dont know if theres a better solvent out there i can try. Quote Link to comment Share on other sites More sharing options...
kennett Posted February 3, 2017 Report Share Posted February 3, 2017 I have a mk 70 of roughly the same age, as yet the bores are spotless. However the outsides are prone to rust fairly quickly if left while in the pub etc Quote Link to comment Share on other sites More sharing options...
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