I bought this marker used and it was in great condition and I have never had an issue with it. The bolt did have some slight paper thin scratches on it from the spring however it was never anything major. I played last week and it was about 90 degrees with high humidity and it was indoor with very poor ventilation. I went to clean out and lube my marker and I noticed a rectangular strip missing from the bolt with some slight metal shavings on the spring. The gun performed fine while I was playing and I did not notice anything unusual until I went to clean out the gun. Is my bolt damaged? Should it be replaced? I have been using eclipse grease to lube my gun and I always clean and lube it after every use.