Welcome to the board.
I've had an opportunity to shoot a scout with an AWC suppressor on it. I think it's a neat idea and would like to do it myself but there are many drawbacks.
You are working with relatively fine threads and the suppressor is going to pull hard on those threads. I've never heard on one coming of the front of an M14, but I haven't really been around them all that much.
The M14 has a relatively fragile gas system. Installing a suppressor and not modifying the gas system isn't really an option. The gas system modification is included in the price for the AWC suppressor. Once the mod is done the rifle will not cycle without the suppressor. This isn't permanent however; if you desire to remove the suppressor you'll just need to swap out the gas cylinder for an unmodified one. Ron Smith has been doing dome work with his Navy model using a QD suppressor; he probably has something new and exciting we might be able to use in the way of the gas system.
More than likely you'll need to scope your rifle; the front sight will probably be gone.
My biggest complaint about the suppressed M14 is al the crap that gets you right in the face. The bolt is on the top of the M14, as soon as it opens all the remaining pressure in the suppressor is vented up out of the breach and right into your face.
Best regards, Chris