Sig MCX Fails Unexpectedly
This guide details the field disassembly and analysis of a Sig MCX rifle experiencing a catastrophic recoil spring assembly failure. Based on Nutnfancy's expert assessment, it highlights the critical weakness in the plastic retention cup and provides steps for diagnosing and disassembling the jammed firearm. The analysis emphasizes the importance of long-term testing for identifying such design flaws.










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