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Posted: 4/22/2009 6:25:33 AM EDT
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Just finished my first AR-15... a S&W M&P lower with DPMS A3 flattop upper. DPMS lower-receiver parts kit. Magpul CTR and MIAD grip. I assembled it all myself. Everything fits together great and functions flawlessly except...
...the selector switch has a little too much play in it. It holds true in the 'fire' and 'safe' positions but still wiggles when touched.  The switch itself also seems to be grinding a bit on the left side of the lower receiver. I compared it to the selector switch on my duty M16A4 (my only other physical point of reference), which has neither of these problems.
Any idea how to fix it? Do I need new parts or did I do something wrong in the build? Thanks |
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If everything is in right and functioning, then your selector is too short and grinding. Also, if it's loose there is obviously not enough tension on it because: the spring is too short/bound up or the selector's diameter is too small. Could be a combination of things. Maybe just try to find a replacement selector. Or you start at the cheap end and replace the spring and detent first.
My bet is out-of-spec selector though... |
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Quoted:
Just finished my first AR-15... a S&W M&P lower with DPMS A3 flattop upper. DPMS lower-receiver parts kit. Magpul CTR and MIAD grip. I assembled it all myself. Everything fits together great and functions flawlessly except... ...the selector switch has a little too much play in it. It holds true in the 'fire' and 'safe' positions but still wiggles when touched. The switch itself also seems to be grinding a bit on the left side of the lower receiver. I compared it to the selector switch on my duty M16A4 (my only other physical point of reference), which has neither of these problems.
Any idea how to fix it? Do I need new parts or did I do something wrong in the build? Thanks I've had this same problem.I changed selectors and that fixed it.I 've had several selectors to fit loose Must have been a bad run of them. |
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