These have become my "go to" iron sights - Ultradyne Folding C2 Picatinny Front/Rear Sight Combo

I've tried several different iron sights over the years. And while I'm not here to put those other sights down, I am writing this review to say that these particular sights are on a completely different level. The dual aperture is such a simple but awesome concept. With no front sight post covering up a target, seeing the target through the rear sight AND the front sight makes a HUGE difference in consistent shot placement. I was shocked at how much easier it was to shoot well with these irons versus other traditional setups. Add in that they are constructed of extremely lightweight metal vs. some of the other popular polymer sights and these get an A++ from me. I actually enjoy shutting the optic off and working out the backup sights now. Highly recommend. You won't regret the money spent.