So I put a set of Pro-RMK shocks on my Assault, mostly because I had my hands on a set to try for zero cost. If I liked I would buy them.
I hated them on the Assault. Way too much push on the trail, the sled actually felt dangerous on the trail. I hated that part. Off the trail they just weren't right. I would confirm what Eric (Mountainhorse) already said. Not that I didn't believe him but when you can try it out for nothing, why not?
They were probably too soft. It turned alright, but it didn't seem stable. Granted the Assault does not have a sway bar either. IF you were in a bind and needed one to get out or to complete a trip, then certainly go for it, but I wouldn't plan on using them for a season.
I had to remove maybe .5 mm from the spacer to fit it in the mount on the assault. I was able to use the OEM bolt with zero issues. I tried a 10mm bolt and it fit in the 2009 Assault mounts with no issues. I honestly couldn't tell the difference in "slop" or "play" with either bolt.