The F-4 used Pro-Lite threads, then later used on the A-5.
The F-1 used wierd threads later used on the Raptor.
The F1 and F4 are totally different threads.
Did the Pro-Am used threaded barrels? I thought they still used slip-fit, and did used threaded until the Pro-Lite?
My crappy MYSPACE
"the evidence strongly suggests that neither Billy nor Adam (Smart Parts) could have invented the electronic paintgun" -Garr M. King, U.S. Judge