Posted: 10/28/2008 1:07:00 PM EDT
|
Received my CMMG middy upper from AIM. Looks great. Mated it with a new CMMG lower I had, cleaned inspected and assembled.
When charging, I noticed that when the BCG moved, a loud audible "zipper" like sound was being created with the action. This occured no matter how slow or fast it was done. Before I bring it to the range and possibly make something minor-worse-I wanted to check in with you guys who built it. Thanks! |