Very nice rifle Eb1. I have always liked the dissy setup... I almost did one of those instead of my 20" build. I like long sight radius, and I like having the front sight taper pinned to the barrel, instead of floating independently of the barreled action like a lot of people have theirs. I also had a MOE handguard on mine originally, though I later replaced it with a free float handguard as you can see in my earlier pic.. The reason for the free float was to eliminate POI shifts between shooting with a sling, unsupported, rested, monopodded, etc., which it absolutely did. I also went with a collapsible stock, mainly for weight reduction and because I wanted side-mount sling sockets for my run 'n gun sling. Back when I built this, they hadn't released the Magpul fixed rifle stock, which has side swivels -- I might switch out for one of those. Cheek weld isn't great on the carbine tube, and I pretty much always keep the stock set at A2 length anyway.
If you like shooting with irons, you might want to try the same kind of setup I have with my Aimpoint -- have it co-witnessed with your irons. The irons are still fully useable right through the tube of the Aimpoint, but you gain a lot of low light and close quarters capabilities. These are especially important if you are using the rifle for home defense or as a fighting rifle. There is no disputing that a red dot is faster than irons up close, and much easier to use in the dark. Plus an Aimpoint doesn't add very much weight... my rifle is only about 7.5 lbs. as pictured. Aimpoints are extremely tough and do not get easily knocked out of adjustment. I don't know what model you were given, but the newer ones have a battery life measured in years with it on constantly. Even if the batteries do die or it gets damaged, you are no worse off than your original iron sight setup. There aren't really any drawbacks to mounting the Aimpoint, the way I see it.
