Everyone knows about the "Glock pignose" effect. The fact that their molding process, combined with the type of polymer they use, causes the dust covers to curl up slightly as they cool. It has ZERO effect on how the gun works. It is purely aesthetic. Most people do not even notice it and most that do don't mind it...but there are some of us that hate it. I'm one of the ones that hate it so I am fixing it on my new Glock 20. As you can see, this gun has the typical pig nose. All I do is dip the front of the frame in very hot water (I use a measuring cup and take it out of the microwave as soon as it boils). I let the guns cover stay in the hot water for about 15 seconds and then insert Q-tips to hold it straight as it cools. Then VIOLA! (pronounced vie-O-laa) No more pignose. Most people ask if this fix is permanent. Well, nothing is permanent, but I have never had one re-curl on me yet. Of course I do not shoot competition or anything. I do have a friend that does who fixes his and he claims they stay fixed. As for it hurting the polymer, it will not. Don't listen to internet dumbasses. Ask an actual chemical engineer or call Glock. So if the pignose bothers you, fix it. It only takes about 2 minutes of work and a couple hours of waiting and it is done.