Had this nail gun around 5 years now. Always looked after it and has always been good to me, If not a bit heavy! Just today/yesterday started to intermittently misfire with it becoming more frequent this afternoon. I tool the top off but there was nothing obviously broken in there. Going to investigate more tomorrow I think. I found a Dewalt diagram and i'm going to look for damage to upper and lower bumper as these seem easy fixes. I am guessing both the bands are ok if it is intermittently firing. Anyone else had a similar problem and know a likely fix? I will try to attach a link to video in next post.