A buddy of mine is in the police academy and he just got a Gen 4 glock 22. He had a Gen 3 a week prior and no problems I heard of problems of jams mostly with the 9mm variations. However he said this week his glock jammed 4 times on him and they all had a hard time unjamming it once. I told him maybe the spring. They cops said it was the spring. Anyone hear of this with the .40 variations and what spring will help fix this if it is indeed the spring?