I put a Nikon Spur Reddot on a 350 Legend upper and works great at 100 yards. Was shooting different 5 round mags in an AR for function tests trying to duplicate 2nd or 3rd round jambs. I was surprised at my 30 shoot group at 100yd with the Nikon Spur. Ordered another one and have it mounted on a Marlin 1895SS in 45-70. Shorter range thumpers. When night falls, thermal comes out....