A prime attraction to the AR style collapsible butt stock is the ability to vary the length of pull. There is already an adjustable feature to the S2K LOP. It simply requires disassembly and reassembly of the but stock.
The length of the bolt and the design of the recoil spring are also relevant. What about shortening the buffer tube and replacing the stock recoil spring with a shortened nested recoil spring. Then adapt the current buffer tube locking pin to one that can be compressed to allow the butt stock to move forward or back without taking the gun apart?
That would allow the gun to still fold and leave the serialized part intact. If one would satisfied with the three existing LOP adjustments to the butt stock, shortening the buffer tube and using a nested recoil spring would be unnecessary, leaving only a compressible locking pin as the newly designed component