C4 flip-up dynamount - Ultradyne C4 Flip-Up .223/5.56 Dynamount Front Sight

I've been using the Ultradyne C4 sights for a number of years on several AR's and can't say how much I like them. I have made them a standard for all my AR's. The front peep aperture makes sighting a breeze even with my nearly 60 year old eyes. I prefer using peeps for anything under 200 yards. If I can see it, I can hit it. I purchased the Apollo-S break specifically so that I could use the Dynamount front flip-up sight on a 20" AR barrel. I have on my wish list the same sights for a .308 AR I just purchased.