Hey guys. I just ordered a new nightforce nxs 5.5-22/56 with MOAR reticle. It's my first high end scope other than the leupold vx-3's I grew up on. It's going on a remington 700 5R milspec .308 that will be a field gun and hunted with. Will ride in a pelican hard case in the bed of the truck or back seat from home to field. As well as on a fourwheeler on the ride in. What is the best ring and ring heights for my setup? Has a 20 moa one piece rail on it. Base is steel. Do I need steel rings or are aluminum fine? 4 screw or 6 screw? Low medium or high? Also what lens covers are best on market now? Nightforce rep recommended the new BC tactical ones to me but I've been reading bad things about them on here. Thanks guys.