For reference, here are a few pics of my SA20 with the M5 RAS:
With the Colt IUR:
I've since built a dedicated target AR, I yanked the RAS and put the factory handguard back on. Since I would never be able to mount the RAS without the RSM tearing me a new @$$hole, I ended up just flipping it.
I've got it looking pretty close to the work rifle, but there there are still a lot of missing details, some I still want, some I can live without, some I would like but are just prohib: sling plate, "claw" charging handle, trigger guard, an actual C79A2 Elcan (instead of just a C79 with the green condom), and of course the f/a BCG, lower, trigger group with all the fun bits and 30 round mags to go with it