My next project AR will have a fixed front sight, and I will use the cut down rear carry handle sight I was using as a backup on the last build.
GI, milspec, tough, drop it out of a 5 ton truck and it still works, steel and aluminum, and a 45 year history of combat.
How many more click phrases do we need to know it's the preferred way to do AR sights?
As for the others - pricey, polymer, broken, aftermarket, not official issue, melts when heated to working temperatures, duffel bag fodder, fragile, not ready for prime time.
Them's the click phrases we see on the market today. OP has the classic case and it's on point - aftermarket sights are not tough enough to hold up to what does happen to AR's in the field. Stoner made the sights to put up with 19 year old graduates of mayhem and what they will do to a combat rifle. If you have served and worked in Basic Training units, you know - get a group of young American males together with a stop watch and a bowling ball, they can break both in record time. It's why Stoner had the front sight located with steel pins and the rear integral with the upper receiver forging.
Even Kyle Lamb wrote in an article now out in American Rifleman, if you are going to transport an AR in a vehicle for long periods of time, better iron sights than an optic. Having flown to Egypt and Cuba with an M16A2 under my boots on a charter aircraft, I tend to agree.
Mounting a front sight on a free float immediately negates what a free float does - separate stress from a sling, rest, or off hand to prevent moving the sight mounted on the barrel. Sights on free floats are right back at being moved around. Fail.
What we have is a current market fad to sell you a $150 mounting accessory option which promises to increase accuracy. It can - but it won't make any rifle more accurate than the barrel and the shooter using it. That takes money, a good barrel, nearly hand picked loads, and lots of practice. Nonetheless, the Hole of the Month club keeps churning out newsletters, we keep buying free floats, and we keep breaking the complicated, fragile, and under designed high precision square range sights we drop onto concrete or ice. Usually for "cool" factor. Got to say, breaking them on ice can't get any cooler. Sorry for the OP, there's a lesson learned there and I'm not going to let it happen to me.
GI iron sights. They work.