SPS or ADL?
SPS will have a hinged floorplate, ADL will be a blind mag.
SPS denotes the finish. ADL is blind mag. So it's an ADL with the SPS finish.
I've never heard of such a thing. SPS is "special purpose synthetic" and would have the hinged floorplate as its a model not a finish much like XCR or A, B, CDL ADL's are blind mag guns.
When I called Remington years ago about what the term "Special Purpose" meant. I was told it denotes the rougher finish.
I had an 11-87 that had the words Special Purpose on the side and I wondered what that meant. And that's what Remington told me.