My 1/2" gun is a MAC that is basically the same as the IR231. I bought it in '86 and has been in use every day ever since. I had to replace one hammer weight but other than that no problems.
Right on, Same Gun. I had one and I also had the "Shock Wave" (Snap-On). I only broke out the Shock Wave when The 231 couldn't bust a Honda Crank bolt loose. That Thing was a monster LOL. Damn for a split second I almost missed being a Line Tech.