Solid irons - SIG SAUER Factory Replacement Adjustable Flip Up Sight Set for M400 TREAD

When an EMP attack, a bullet, or failure to change the battery compromises your optic, you’re going to want to go to old school optics. These are very well designed and very rugged. These are pleasant to use and to look at but they will cost you in weight. You could consider an optic with etched glass but I prefer the co-witnessed iron look.