The M&P “Combat Optics Ready Equipment” version features a worked-over 4.5 pound trigger (slicker than buttered Teflon), and raised iron sights to allow co-witnessing with mini red-dot sights like the Trijicon RMR shown here. The slide also has a factory cutout and five adapter plates so you can mount the mini red-dot of your choice. Now I ought to point out that raised iron sights are also perfect for use with suppressors, but the M&P C.O.R.E. doesn’t come with a threaded barrel. Can you say ‘aftermarket?’ Price: $650.