I mentioned in another message chain that I was having problems with a new (to me) Kahr P9. The mags suddenly stopped staying in the grip.
I checked the mag release, which is polymer, and it looked pretty ragged.
I sent an email to Kahr about the problem, and asked how to get a replacement. (I gave them my address.) On the 10th...
I didn't hear back, so emailed them again, today.
Got home from work, there was the mag release, free. No comments, but good instructions on how to install it. Took about 15 seconds. The new one seems to be reinforced with a metal insert.
Good service, quick turnaround. I'm pleased, again.