I have an update. Alexander Arms has notified me that they're trying to find an extension that will keep everything lined up. So, perhaps my existing extension was bad? Or the required torque didn't line up the gas port?
I'll post more as I hear it.
Ken
Edited to add: It sounds to me like they're reaching into the parts bin, grabbing an existing extension, spinning it on to the right torque value and then seeing if the extension lines up. Obviously, the parts on the extension (upper index pin (or just the hole?? not sure if they press the pin in AFTER they spin it on) and extension M4 cuts need to line up with the barrel's chamber and gas port.
It's interesting that they're not lining up. If they aren't lining up now (with the proper torque), how did they line up BEFORE?
Also, if all the barrels and extensions are milled identically, the threads would all be timed the same. I have NO idea how they manufacture the barrel threads or the extension threads, but the process of just grabbing extensions and seeing where they end up after spinning them on seems...sub optimal.
Regardless, I have total confidence Alexander Arms will make this right. Either by finally (randomly?) finding an extension that will time correctly with the specified torque, or by replacing the barrel. For that, I'm glad I went with a reputable manufacturer.
End edit.
I'll post more as I hear it.
Ken
Edited to add: It sounds to me like they're reaching into the parts bin, grabbing an existing extension, spinning it on to the right torque value and then seeing if the extension lines up. Obviously, the parts on the extension (upper index pin (or just the hole?? not sure if they press the pin in AFTER they spin it on) and extension M4 cuts need to line up with the barrel's chamber and gas port.
It's interesting that they're not lining up. If they aren't lining up now (with the proper torque), how did they line up BEFORE?
Also, if all the barrels and extensions are milled identically, the threads would all be timed the same. I have NO idea how they manufacture the barrel threads or the extension threads, but the process of just grabbing extensions and seeing where they end up after spinning them on seems...sub optimal.
Regardless, I have total confidence Alexander Arms will make this right. Either by finally (randomly?) finding an extension that will time correctly with the specified torque, or by replacing the barrel. For that, I'm glad I went with a reputable manufacturer.
End edit.