Dimensionally they are the same. The "flag" on the block for the newer models is slightly different. It will depend on your model and revision number. (dash#)
Smith and Wesson may be able to provide a new one at no cost.....1-800-331-0852
If you are interested in replacing the missing block and you are unable to find one, let me know, I can send you one.
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Ret. LE, FA Instr, S&W Armorer
Last edited by armorer951; 01-13-2017 at 12:33 PM.
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