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Did you notice if the rotor and metal wear plates were scored up from friction? That's probably the problem. You'll need to sand them smooth. Put the rotor in a drill chuck and use sand paper against something stiff like a putty knife. The drill is like a make shift lathe. The wear plates are tricky but a small angle grinder works. Use the sandpaper style attachment. If that's not it the bushing might be loose. If the bushing is loose then it's junk. They don't make housings anymore for the mg31.

@@outdoorsliving464 I fixed it. It seemed the housing was a hair too large. Had another gun (the same model) and it slid in perfectly. Milled the old one down a millimeter and viola. It worked like new.

@@bon2198 nice! what part of the housing did you mill?

@@outdoorsliving464 the outer parts that extend higher than the center portion. So basically front and rear.

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