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Discussion Starter · #1 ·
so i bought a new sig mpx last week. cleaned the bolt carrier group and the upper receiver pretty well. shot a few hundred rounds and a steel challenge match and it has functioned amazing (bolt was kinda hard to rack but has smoothed out). today i went to the range and i couldnt get through a mag without malfunction. ejection was weak, had a few light strikes, a lot of failures to feed, a lot of failures to extract, and once an empty case got turned around and jammed into the chamber and the bolt tried to pickup another round. sort of a double feed type thing but it was a pita to clear. only have about 500 rounds through the gun so far

i got home and cleaned what i could by hand. will use my ultra sonic cleaner soon. gonna try to pull the barrel and gas system off and clean those too. anything else i need to do?
 
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