The best way to check weight is a scale, due to possible mods made by previous owners.
But if that is not possible, the mfgt's label should be found in a kitchen cabinet or on the exterior if it has not been removed.
Looks something like this:
Kim and Steve, Mustang LCDR (Ret), '07 Damon Outlaw #1193
I have seen gross intolerance shown in support of tolerance, Samuel Coleridge
WE LOVE OUR OUTLAW RV