For those that are interested, the Limbsaver that perfectly fits the M590 stock is part no. 10201.
Someone had said "IMO, the LOP on the 590's stock is already waaaay too long for a defensive weapon. Adding a nice, fluffy Limbsaver, or similar pad, is going to make it even worse."
The fact is that the Limbsaver is only 1/8" thicker than the original OEM pad, which IMO is a negligible increase. The OEM pad is literally as hard as a hockey puck (well not quite, but you get the idea). The Limbsaver is so soft that the difference is amazing -- best described I guess as being like pushing in on a partially deflated football.
Anyone know if this model (10201) fits the speed feed stock? If not, is there another model for that stock?