I just got my 7.62 Raptor in the mail Saturday. I tried to fit it today and it binds. The binding occurs when trying to close the bolt, but not until the bolt is 3/4 of the way closed. On mine it really looks like if I took off the nib on top it would clear enough to function. I haven't decided if I want to cut it and hope it works or just send it back to Rainier. I purchased my M&P-10 in July 2013, not sure what the production date is.