Arsteve2000 Posted September 5, 2021 Report Share Posted September 5, 2021 Hey everyone, I wanted to share with you all an issue I’m having with my CMMG MK3. I’ve shot around 500 rounds through it. Currently, my rifle is not cycling properly after firing my first shot. Second shot won’t fire. At first I though it was a hung fire, but kept happening. I came home and took it apart and found out that the gas key was loose. Both screws came loose. Also, they were not staked. There’s also pitting/scoring on top of the gas key as well as on the gas tube. Quote Link to comment Share on other sites More sharing options...
Arsteve2000 Posted September 5, 2021 Author Report Share Posted September 5, 2021 (edited) IMG_8598.MOV Edited September 5, 2021 by Arsteve2000 Failed video upload Quote Link to comment Share on other sites More sharing options...
Arsteve2000 Posted September 6, 2021 Author Report Share Posted September 6, 2021 IMG_8598.MOV Quote Link to comment Share on other sites More sharing options...
blue109 Posted September 6, 2021 Report Share Posted September 6, 2021 @Robocop1051 should check this out. He loves CMMG parts. Quote Link to comment Share on other sites More sharing options...
jtallen83 Posted September 6, 2021 Report Share Posted September 6, 2021 You gonna fix it yourself or warranty it? Quote Link to comment Share on other sites More sharing options...
unforgiven Posted September 6, 2021 Report Share Posted September 6, 2021 Just get a Toolcraft BCG brother. Keep the other one for paperweight. Just my 2 mags Quote Link to comment Share on other sites More sharing options...
shooterrex Posted September 6, 2021 Report Share Posted September 6, 2021 Just change out the BCG and drive on. Toolcraft makes good ones. Quote Link to comment Share on other sites More sharing options...
Robocop1051 Posted September 7, 2021 Report Share Posted September 7, 2021 On 9/5/2021 at 5:49 PM, blue109 said: @Robocop1051 should check this out. He loves CMMG parts. We don’t use that 4 letter word in my house. Quote Link to comment Share on other sites More sharing options...
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