I have a Ar with a PRI MB on it It has been in the safe for a while. This is one of the few I bought assembled from MSTN if I recall. Just took it out and noticed the brake is 180 out of time. Took it off checked to make sure it was a crush washer and went to retighten it. It is way to tight to make it rotate 180 degrees. Can you squeeze a crush washer in a vise and then install it? Do I just need another crush washer or am I missing something.
AHA
Rad
AHA
Rad