Well, heres the problem. The only feed neck my local shop has in stock in imp threads is the new smart parts Q-Lock feednecks. I didn't get to test fit it in the gun today when i was there, but from what i can tell it looks like the Q-Lock neck has a thread or two less then the stock ICD one.
So simple question really, will the q-lock still stay firmly in place? Thanks, and yes i know, SP sucks. But boy do I hate waiting for things to come in the mail.
EDIT - This is a B2k.