RCU Forums - View Single Post - HELP! Irvine .40 MKII really low compression
Old 07-17-2019, 02:23 AM
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A little oil should bring it up to par, then a little running will make it great. It's very likely a Dykes ring and will always feel soft on compression.

Last edited by Hobbsy; 07-17-2019 at 02:33 AM. Reason: Add picture