Doug... I've had several 7.62x51 rifles, a couple of M1As, inch pattern L1A1, and AR10... I am primarily a game player, USPSA, 3 gun, and now an AR9 for pistol caliber carbine competition... early on, there was a premium on shooting major caliber (.308) but not so much today (there is a Heavy Metal division)...my game 5.56 rifle has a Trijicon TA31-F... and the back up has the older TA01... the young guys today mostly go with the low power variable optics... good luck with your choice

the RMR pistol project is in consideration of advancing age, and declining eyesight... cataracts are not quite to the development stage to warrant an operation yet

if I had kids that were in law enforcement, they would be carrying a RMR equipped pistol if allowed by their administration... I think it is the wave of the future