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  #11  
Old 02-07-2017, 09:15 PM
Mike13A5P Mike13A5P is offline
 
Join Date: Sep 2016
Posts: 15
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We'll start by giving the trigger groups a thorough cleaning by using a good product like MP7 cleaner or power blast and test fire.
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  #12  
Old 02-14-2017, 08:17 AM
Logdog Logdog is offline
 
Join Date: Nov 2013
Location: Mandeville LA
Posts: 253
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Look at the hammer and disconnector, and sear surfaces, if someone has tried to do a trigger job on the trigger group and took too much metal off any of those parts, you can get doubles to full auto. Trigger jobs basically remove slight metal at those points that transfer the hammer between disconnector and sear to remove any friction.
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  #13  
Old 02-14-2017, 08:37 AM
Mike13A5P Mike13A5P is offline
 
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Thanks. Field stripped them last night, gave everything a good cleaning and inspection and all looked good. We're going to test fire and try to further isolate issues, if a any. There is also the possibility of "operator error" so we will be checking for that also.

Last edited by Mike13A5P; 02-14-2017 at 08:55 AM.
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  #14  
Old 02-14-2017, 08:55 AM
Logdog Logdog is offline
 
Join Date: Nov 2013
Location: Mandeville LA
Posts: 253
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I would suggest cocking the trigger group, carefully pull the trigger, and keep pressure on the hammer so it does not slam forward, keep the trigger back, and ride the hammer through the arc of movement. The hammer should engage the "disconnector", when you release the trigger, the hammer will transfer to the sear and stay back, if someone has taken metal off parts, the hammer may fall, when you release the trigger.
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  #15  
Old 02-14-2017, 08:59 AM
Mike13A5P Mike13A5P is offline
 
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We did that last night. Saw no evidence of a so called trigger job on the trigger guard assemblies. Our rifles were issued by the CMP a couple of years ago so they were probably inspected and checked for proper functioning before they were issued to us.
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  #16  
Old 02-15-2017, 11:19 AM
Mike13A5P Mike13A5P is offline
 
Join Date: Sep 2016
Posts: 15
Default Double fire problem solved

Would like to thank all who responded to my original post and those that provided some really good tips on problem solving. After field stripping, cleaning and inspection, with particular attention paid to the trigger assemblies, there were no apparent issues noted. The rifles were taken out and test fired, paying close attention to trigger management and all rifles fired correctly in a single shot mode. I had no idea that we were originally dealing with an "operator error" problem until those of you who posted that information brought that to the light of day.

Thanks again for all the help. Good shooting to you!
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