Adjustable comb ???

RJoe,
Exactly as Revoman said; it will depend upon whether the existing butt-stock is hollow. I suppose you could fill the stock with some kind of plug or epoxy if it was hollow too.
Here is a factory synthetic stock on the Marauder. It comes with an adjustable comb.

1527485530_6416664605b0b945a19f589.84866780_Marauder level.jpg
 
Thanks for the help. I'm a reformed trap shooter so am familiar with all the ways to spend money on a shotgun stock. I actually have several sets of hardware for doing an adjustable comb. I guess my question should have been, is the material in a synthetic stock conducive for an adjustable comb install. I haven't handled an FX synthetic stock but some of the synthetic stocks I have handled just haven't felt solid. Has any body taken a saw to an FX stock?
 
Have ya tried trap shooters anonymous??
I have not cut into my stock, it actually feels solid and the butt stock 'recoil pad' has long screws which may indicate it is solid as well. I suppose you could email FX. I did that last year on a magazine issue and heard back from them about a week later with apologies for the late response.