Last nov I bought my first center fire pistol. A g20sf. Ive proceeded to put around 10k rnds through it since then. A while back I picked up a LW 40 barrel and I love it. When I first got the gun I had a bad habit of dropping one in the chamber then dropping the slide. I probably did it 15-20 times before somebody told me I was an idiot. The gun has given me no real problems. Today I decided to really give it a good once over and clean and discovered I had chipped off about the top 1/3 of the extractor! The funny thing is I ran about 300rnds through it today that all fed and ejected perfect! Have that gen4 guys! I totally know that it was my fault it broke. Lucky for me I had the spare parts, and I double checked it was the exact same one. I also replaced the plunger rod and spring etc. I'm really happy with the gun. This is how a glock should be.