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Posted: 7/11/2017 8:18:18 AM EDT
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The rifle was having a failure to fire quite often, it started as what I though was a brake in and oiling issue but it seems to go far beyond that.
The rounds had a light primer strike and the trigger felt spongy. The rounds used are Federal XM193LC1 using Gen3 PMAGs. I have a factory build Adam Arms Gas Piston upper with a voodoo barrel in 556, with a Spikes lower using a slide fire mil spec buffer tube spring and buffer (it is NOT a bump or slide fire system) using a FosTech echo trigger. It does malfunction in semi and echo mode. Initial contact with the company they said that it might be the buffer. I weighed it and it is in the H2 range It looks like there are dents in the neck and a light primer strike. Add that it shows the ejector marks on the fired brass to the unfired not having it. For the H2 buffer it had close to 1000 rounds. The std buffer had about 500 rounds before it was placed in the 5.56 lower and while it had the same rate of failure to fire as the H2 did, I could only find the 1 round in my grass. I bought this upper complete from a local dealer. I tried clp and even grease, on the bolt group, polished the chamber. After the last email with Adam from Adam Arms I cleaned it all again and used mpro7. When I can get more ammunition for the 6.8 and the 5.56, I do have a different manufacturer for the 556 and I am going to try and switch lowers and see if that changes |
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how either functions.
Fired brass https://drive.google.com/file/d/0B6A8UfpmWbzYcHlFQTNPSERwbmM/view?usp=drivesdk https://drive.google.com/file/d/0B6A8UfpmWbzYcUItRFNKZHV0eUk/view?usp=drivesdk https://drive.google.com/file/d/0B6A8UfpmWbzYc2oxbV8wN3RxeVU/view?usp=drivesdk https://drive.google.com/file/d/0B6A8UfpmWbzYY1QxMS1tUE9MSlk/view?usp=drivesdk https://drive.google.com/file/d/0B6A8UfpmWbzYOHJ2X0pUc0t5Um8/view?usp=drivesdk https://drive.google.com/file/d/0B6A8UfpmWbzYWWJxQXBBS3J4dDQ/view?usp=drivesdk Failed rounds https://drive.google.com/file/d/0B6A8UfpmWbzYSmhWb2w3U3huOHc/view?usp=drivesdk https://drive.google.com/file/d/0B6A8UfpmWbzYUG1NcENwbDdzSHM/view?usp=drivesdk https://drive.google.com/file/d/0B6A8UfpmWbzYX3FLVFgxZXhKMG8/view?usp=drivesdk AR parts https://drive.google.com/file/d/0B6A8UfpmWbzYVnNaQ2xGYjZTaWs/view?usp=drivesdk https://drive.google.com/file/d/0B6A8UfpmWbzYcW1VR2FwMHJOYmM/view?usp=drivesdk https://drive.google.com/file/d/0B6A8UfpmWbzYdVlrd3pjblFGZ3M/view?usp=drivesdk https://drive.google.com/file/d/0B6A8UfpmWbzYTWRaR2dSeWo3MzQ/view?usp=drivesdk https://drive.google.com/file/d/0B6A8UfpmWbzYYl9CTHVfaVRORFE/view?usp=drivesdk https://drive.google.com/file/d/0B6A8UfpmWbzYQTJvaGlpUS02RnM/view?usp=drivesdk https://drive.google.com/file/d/0B6A8UfpmWbzYLUtTQjlmbksxLXM/view?usp=drivesdk https://drive.google.com/file/d/0B6A8UfpmWbzYa3dfdjRIN1h5VE0/view?usp=drivesdk https://drive.google.com/file/d/0B6A8UfpmWbzYYkpfUzhVTExSTTQ/view?usp=drivesdk |
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Please reach out to Adams Arms at [email protected] or [email protected]
-Phil- |
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Quoted:
I am going to try and switch lowers and see if that changes did you try a non-Fostech lower? i.e. a lower that has a conventional trigger? did the AA upper work with the conventional trigger? although i know that's not the objective, just trying to help narrow down the issue for troubleshooting. |
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Quoted:
did you try a non-Fostech lower? i.e. a lower that has a conventional trigger? did the AA upper work with the conventional trigger? although i know that's not the objective, just trying to help narrow down the issue for troubleshooting. |
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