Any of you still looking for one?
My dad has one laying around that he wants to sell. It came on a 300AX and my dad, who is 73, wasn't a big fan of the looks so he had a similar but straight, round, baffle brake installed. Personally, I think Kirby's PK brakes are very cool looking and they work VERY well but my dad didn't care how well they work, he just wasn't feelin the look of the PK brake.
PM me if any of you that missed out are still interested in a PK brake.