You could gently stone the face of your receiver to just barely remove the anodizing and help your nut lock up where you need it. Torque specs are a guideline, but it all comes down to lining up that gas tube. Not sure if this helps but this is direct from their site. - Removal of flash suppressor - Removal of front sight post/gas block - Removal of delta ring - Installation of the barrel nut. Please note that when screwing in the barrel nut, we recommend approximately 35 pounds of torque. The barrel nut is made of aluminum and over-torqueing may result in damage to the barrel nut. - If you are installing a low profile gas block, the installation of the low profile gas block - Screw in the jam nut, Screw in the free float quad rail. Secure with the set screw. - Replace the front sight post/gas block, if necessary - Replace the flash suppressor For a good tutorial on a free float quad rail installation, we recommend viewing NicTaylor00’s outstanding free float installation videos on Youtube: Part 1: https://www.youtube.com/watch?v=wk0e9LA1wqM Part 2: https://www.youtube.com/watch?v=rxylroMyQ2A