I read these kinda threads and I laugh. Not at the writer, but at the times I have seen high quality fightin guns hit the ground, asphalt, concrete, dirt grass, floors, whatever. I've seen sights bent, knocked off, you name it. Careless handling you say? Not hardly. Some of the finest SWAT team members, trainers, and tested fighters Law Enforcement has had to offer. Superior shots, dangerous in a fight, stayers to the end.
Guys, it happens. If you use and carry one long enough, you will drop one. If it ruins the gun then you didn't have much to start with.
I once stormed a bank with a gas operated shotgun and a couple of backup officers. My Python beat me accross the lobby area and hit a marble floor at the same speed I was running. I was chasin a burglar one night over fences, and when we made our way back into the street, an almost new Model 19 passed me on the asphalt.
A friend of mine shot it out with a Black Panther Party member in 1964 at the distance of "ACCROSS A CAR HOOD" and hit the guy in the chin with a round. Didn't knock the guy down and he ran. My friend jumped a chain link fence and lost his Model 19. Picked it up and continued the fight.
I have an 870 Remington that many a bad guy has looked at the business end of. I have held them at gun point until a back up got behind him. When the fight started I've jerked the slide back, and chunked the gun to get in the fight before the guy killed a cop. That same 870 works today and is as reliable as it was the day I bought it over 30 years ago. USED!
By all means practice gun saftey, but a QUALITY FIREARM will not discharge if dropped. I have built and owned a many a 1911, BEFORE the drop safety, and have seen them hit the ground on the muzzle, but have never seen one go off. Oh I know, they can, and the gun rag writers will swear they've seen it, but I made my livin with guns for 21 years, and I never have. I was an instructor for 18 of those years, and tactical for more than half of them. Good quality guns are far tougher than most folks would ever imagine.