Quote Originally Posted by DPI JOSH View Post
There is a trick to not loosing the bolt. Essentially it is a jam nut situation with one nut fixed to the bracket and the other loose. Replace the loose nut with a nyloc and the vibration problem goes away. Works every time here at DPI.
Yup, good trick. When installing the nyloc nut, it helps to install the nut in the normal orientation first to help form a thread through the nylon locking feature. Then remove and reinstall the nut with the nylon feature towards the head of the bolt.