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Troubleshoot
#8
Find someone with a working grendel upper, swap bolt and carriers with them. see if that other BCG works in your gun.

I recently had this happen with my 6x45mm build.

Everyone said it had to be a gas system problem but it ended up being the bcg.

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Messages In This Thread
Troubleshoot - by blackfoot - 01-28-2012, 09:59 PM
Troubleshoot - by Mutt - 01-29-2012, 01:47 AM
Troubleshoot - by blackfoot - 01-29-2012, 01:55 AM
Troubleshoot - by bwaites - 01-29-2012, 02:01 AM
Troubleshoot - by elkbow - 01-29-2012, 02:54 AM
Troubleshoot - by blackfoot - 01-29-2012, 03:36 AM
Troubleshoot - by LRRPF52 - 01-29-2012, 03:43 AM
Troubleshoot - by Bennybone - 01-29-2012, 04:26 AM

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