Pleasant ridge

Couple questions I have obtained a used M1 20 ga. with a synthetic stock it appears to be set up with the "C" shim on the stock giving it more drop, I have noticed there are plastic shims in the package as well are these for cast? Which one would be proper for a right handed shooter? Second question is, This gun came with a limbsaver pad, I need to shorten the LOP some, is there a thin pad that I can buy to fit the stock? Thanks

If the SBE's drop in price do you suppose that will be the same with the M1 now that the M2's are in circulation.

Thanks for the replies, folks. Golden bear, I sent you an e-mail

Is it possible to shorten a synthetic stock on a M1? I will need it shortened to a 13"LOP.