The Texas Rangers have used a variety of spacecraft over the centuries, often obsolete designs retired by the Texas Navy. That is how they acquired their first Abilene-class frigates and F-2 Star Furies in the decades before The War came upon us all. Both were Pre-Contact designs upgraded with gravtech after the Peloran gave it to us, and both had continued to serve the Navy for decades. But the Rangers found them after their eventual retirement and chose to acquire all the examples that they could. The Rangers have used those two designs ever since, and they have even contracted new production runs from the original manufacturers to expand their fleet. Wherever you see an Abilene or Star Fury now, you can expect to see a Texas Ranger in short order. They do not tend to keep the peace from the shadows after all.