I have my 4595 like I want it now. Pinned in the stupid springy butt plate, much better now that it's solid. I hated to spend nearly $180 (as much as I spent on the used carbine) on replacing the plastic rails with Aluminum ones, but now they are usable. Went with the extra long top rail to have a longer sight radius with the Magpul flip ups. I really didn't have confidence in the factory front sight, being clamped on with set screws down in dimples. If it were to get bumped and moved, it wouldn't have moved far (still down in the dimples) but enough to be off. This long rail really links everything together solidly. Optic is a Primary Arms Cyclops. 1x (no magnification) but the etched reticle and adjustable diopter are great features. Sling is a Vickers, I used them in the Army. And have them on all my carbines. I drilled out the factory swivels and put in some 1 1/4" swivels. Not real sold on the forward grips, but I had it already and wanted it on there when I did the paint so it would be the same. It probably won't be on there much. It has a Q.D. lever so easy to take off. If I put a light on it would probably be the OLight pistol light I have, a bit big and heavy for a pistol, but it is on the small size for a long gun light. It is 1350 lumen with a green laser, and would fit nicely on the rail under the barrel, and be fairly protected there. I also have a Surefire Dual Output (600 lumen) with wired end cap, and the Tango Down VG has a slot for the pressure plate to turn it off and on. I threaded the barrel last week, and had an A2 flash hider last time I shot it, but the groups opened up when it was on. I'll try it again when I go out shooting, but for now the muzzle just has a thread protector. Might have gone overboard on the camo job, I'd like the carbine to be a bit more tan/brown than green for the terrain around here so will fix that after the range trip Sunday. My dog always has to get into the picture !