Aftermarket G19 Glock Barrel

I started shooting Gen 5 Glocks. I like everything about those guns except the tight chambers.

My pile of reloads ran perfectly in my Gen 4, M&P, AR. They are loaded too long (1.135) for the gen 5.

I would like to purchase either an Alpha Wolf or Brownells barrel. 2 questions:

1. Are these reamed with the GEN 4 (generous) leade or are they cut short like Gen 5?

2. These are both advertised as fitting all generations of Glocks. I was under the impression that Gen 5 barrels were not interchangeable with earlier generations. Are they actually interchangeable?

I just spoke with a nice woman at Lone Wolf. She kept telling me how long the barrels were. Didn't know how to answer my questions. I submitted a question to the tech people at Brownells and have not heard anything.

I answered my own question number two. Spoke with a Glock sales representative. Gen 4 barrels are compatible with gen 5 pistols