rjmcgough Posted May 4, 2012 Posted May 4, 2012 There is grey slime in my ics m4a1 lower gearbox!!!!! Is this a major problem
Supporters Rock-climby-Dave Posted May 4, 2012 Supporters Posted May 4, 2012 this is the standard factory grease, nothing to worry about, but worth replacing with new stuff - silicone grease.
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