Warbird Information Exchange

Hey all, I was wondering if anyone had any good drawings of the Browning an/m-2. All of the good detailed drawings I have found online are of the heavy barrel version. I am trying to build a non firing replica and i thought i had it figured out until i found a pic of a B-17 with the barrels removed while the rest of the gun including the cooling jacket still installed in the bomber. That kind of threw me for a loop as to how the barrel attaches to the gun. I have looked at several of the local war birds around here but without disassembling them I really couldn't glean too much info. Thanks in advance for any and all replys.