Sorry I didnt get back to this thread today, TR covered it quite well, heck I might even try and hire him to fill one of my open armorers slots
A good number of the A2's that I converted were not that tight at all, I could grab on while wearing mechanix gloves and unscrew without using a wrench.
These were A2's that had been purchased mid to late 80s and had sat in the racks unused/fired since then.