Simon ( Tench, on this forum ) has fitted one on a 500 , I dare say he will see this thread and answer you shortly
TBH , I've been thinking about it as well, then I checked a shot string at 780 on the sweet spot and decided not to bother , you'd be better off having an internal polish and a trigger set up as mentioned above
FTP900 MTC connect,Welhamanium internals -sorted
HFT500, ACZ stock MTC connect
TX200 Mk3 CS1000 stock, hawke vantage sf , Nick G internals
Steyr ?, maybe , they cant all be wrong?