Tim4k5
.270 WIN
The 590 doesn't have the issue with the pinned forends and some of the 500's don't either.....it's somewhat model-to-model on the 500's. If you have a 500 with a pinned forend all you would have to do is order a Mossberg slide action tube assembly to go with the new forend, they can usually be found for around $50. They have 2 different lengths, so you just have to be sure and order the right one for the forend you want to use.