The 306 should thread on fine, drip sheilds don't thread they have o-rings that seal to the outside of the atty. The adapter may be a good idea to use with anything you attach to it, my first black chrome YJ i had to replace on warranty cause the threads wore out and won't hold any atty after about 2 months and I've heard of others having the same problem so if you leave the 510 to 510 on the LT and just screw/unscrew your atty s from the adapter then it could save you problems down the road.