Adjustable Stocks
Do you want an adjustable buttplate, or an adjustable cheekpiece, or both?
What game are you shooting, Trap, Skeet or Sporting?
Can you install it yourself?
If you can;
Do you have a Brownells Catalog?
www.brownells.com
they will send you a catalog if you request it, everyone should have one, lots of different styles in there.
If you want it done professionally, check with the local Trap & skeet Club, they usually have contacts with gunsmiths who do the work, also magazines like Shotgun Sports and Sporting Clays often have advertisements from companies that do the work.
My own opinion is that they are more trouble then they are worth, they can work loose and change adjustments over time. Also shooters often constantly adjust them to compensate for poor technique, and never really do it right
My $.02 as usual
Geoff Ross