03-23-2014, 09:19 PM
I am finally starting on my first build and right off the bat I have a question. First I have 20" Lilja 704 profile barrel and a seekins IRMT-3 upper. They will not go together - very tight. Just wondering if I need to put the barrel in the freezer and warm the upper up. Is this the best option or is there a better way?

