For me, I have replaced two of my Glock barrels with a wolf barrel because I shoot a lot of lead. The wolf barrel is just as good at the Glock barrel but even better in my case since I shoot lead. I have one in my Glock 19 and my Glock 21. lots of barrels out there to choose from. The wolf barrel is a good barrel and wont break the bank. Good luckWhat are some recommendations for the best mid priced barrel to replace the factory barrel on a gen 3 G21?