Possibly will work in SPS stock but not sure. Regardless, I believe the SPS stock will need to be inletted if it can fit this bottom metal conversion. I'd call Numerich Gun Parts at (845) 679-4867 and ask if it can be fit to a SPS stock. I have a Remmy with SPS stock and am using Badger Ordance bottom metal conversion for target build. The Badger Ordance bottom metal I dont beleive will fit the SPS stock. The Badger Ordance Bottom Metal is a thicker milled aluminum piece that uses AI magazines. It will fit the ADL and BDL stock with some inletting. McMillan is making a A-5 stock for my build and they are molding it for the Badger Ordance Bottom Metal. I sold the new SPS stock to a friend for $20.00 and he is going to use this stock as is.