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#1 |
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many sites say the m15a4 can take a m120 spring out of the box, so i got one and when it fires it makes like a grinding as being fired. I have an 8.4 volt 3800 mah battery which is probably alright. so can you guys please enlighten me on the problem?
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#2 |
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Grinding is not good you may have lost a shim.
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#3 |
the grinding noise means that one gear is moving laterally, and teeth are chewing on stuff.
You'd better not operate it and have it fixed. |
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#4 |
sounds good thanks
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