i am by no means a fan of glocks, but i do know many friends with glocks (mostly cops) that have surpassed the 20k mark without any mortal damage to the gun. i sold both of the glocks i owned before they hit 2k rounds because i couldn't trust the reliability, they both had jamming problems. i think that most quality handguns can last that long and longer. my beretta 92fs has close to 40k rounds through it, and the sig 229 has over 10k. in short, i wouldn't worry about it.