One time, I had gotten into an argument in a Facebook group with a guy who was alleging that there were Remington Model 8 rifles modified to fire full-automatic, and he showed a picture of a Model 8 with a long curved magazine and a TSMG vertical foregrip as proof. I had recognized the photo as an auction listing photo from Rock Island. So, I contacted them through their Facebook page, asking if they could provide a link to the auction in which the rifle was sold. The person with which I was communicating was extremely helpful, producing a link to the auction listing in no time. Long story short, the rifle is in fact semi-automatic, and the guy was wrong. In the process, I found out that the rifle was the property of the Texas Ranger discussed above, Manuel Trazazas "Lone Wolf" Gonzaullas.
It is a very interesting rifle due to the modifications made to it. The rifle is a Model 8 Police, fitted with a 15-round detachable magazine, made by the Peace Officer Equipment Company of St. Joseph, Missouri, and a beefier foregrip, also part of the modifications made by POE Co to convert the Model 8 to Police configuration. The modifications made by Gonzaullas (or by other(s) to his specifications; I don't have any information regarding that) include the TSMG foregrip as previously stated, a tang-mounted Lyman aperture rear sight, a side-mounted commercial M1907-type sling, and an enlarged bolt handle knob for surer grip when running the action.