5" 9mm barrel wrong thread pitch listed - Stern Defense SD AR15 Barrel

After spending an extra 200 on a 1/2x36 tri-lug and mount, come to find out the description is wrong on the thread pitch. The 9mm barrels have standard 1/2x28. So don't mess up your barrel or muzzle device as the 1/2x36 will thread on about 2 turns and then bind up. Now I have to return or buy another tri-lug in the correct thread pitch. Overall however the barrel looks to be of good quality and manufacturing.