Brocock Compatto .25 ??

Yes, Yes but unsuccessfully. Never could get the tube apart by ANY means that would not mar it! Others have installed regs though with no issues. 
I still have a Robert Lane regulator sitting around that fits it and the Daystate Huntsman Regal XL.

I found 30 ft/lb too low so I tore into mine and altered the transfer port variable restrictor and hammer spring to make it shoot 40 ft/lb. It did however cut way down on shot count (10).

Thurmond 
 
I'm trying to figure out weather to get a .22 or .25 . I like the idea of the extra power of the .25 but I like the shot count of .22 , that said I'm wandering if there's a regulator out there that would give a .25 a decent shot count ?? I know there is other guns out there that would give a better shot count in .25 but the Compatto looks like it would make a great hunter.
 
"Dertnc"The more I look into it, I think I'm leaning more towards the Bantam High-lite in .22 , it has a better shot count for not much more money.
I have an unregulated Bantam and it is my favorite among the 4 PCP's that I own. The size, weight and balance is just about perfect, it has a high shot count and it's dead-on accurate. Good looking gun in Beech too.