smr32767 Posted May 1, 2017 Share Posted May 1, 2017 (edited) Anyone know what markings Sig uses on their MPX barrel extension/gas block? I have two known Gen2's that are marked with a "C". I have two more unknown blocks marked with a "8". I am trying to verify that they are Sig parts and, if so, what Gen and serial number range they would be from. Thanks for the help. Edited May 1, 2017 by smr32767 Link to comment
ccshooting Posted July 14, 2017 Share Posted July 14, 2017 The ones marked with an 8 are aftermarket blocks from In Lead We Trust. They are a company that makes barrels for the MPX. Note the ILWT markings on the barrel in your pic. Link to comment
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