Replying to Homemade Rails

If you've made any homemade rails (PVC or metal) post them here and describe them a little!

Here's the one that I made in shop this year. 8' steel, top is 2X2 and supports are 1.5X1.5. Paint and primer are both rustoleum. I MIG welded it.

If I get pictures of my friends PVC Cannon, I'll make sure to post them