What kind of rivit gun are you using? If it is clear access you should be able to set the rivit tight. Factory length appears good. Push the rivit in tight and get the head of the gun down hard on the rivit. Pull the rivit without leaving it get loose on the set up.



If you still have problems. Buy a pneumatic rivit gun. I have used these guns alot and they work great. You can buy them over the internet for between $80 and $150 bucks.