I don't see the need for the quiet LR.
We've been on safari three times in three different areas and never had a problem getting as close as we wanted to any animal except a Leopard.
The animals ignore the trucks.
That said, I think the ability to ambush poachers is pretty useful!
In Botswana (Chobe NP) the BDF ran the anti-poaching patrols with ACMAT trucks with both light & heavy machine guns mounted.