The "One Ragged Hole" comes with 2 different size sights, I use the smaller of the 2 on my MKII and can definitely say it offers very fast target acquisition. On my ROA I use the adjustable ones it came with but I did have my gunsmith in-lay the front sight with a flourescent plastic on the back of the blade, not the top, then blackened the rest of it. For grips, I put a set of Hogue black rubber grips on my ROA, fit my hand much better and felt more secure than the factory ones, but that's a personal preference. For factory loads in the R&D I would stay with "Cowboy" loads, ie. 250 gr lead at 8 - 900 fps, no problem on a whitetail out to about 35 yds.