TM vsr hop up barrel
 

I purchased a TM vsr precision barrel and hop up unit from Redwolf.
I opened it up to change the bucking and found an AEG barrel.
Is this normal? It was my understanding that the vsr has a differently cut barrel.

It does, but there are some hop chambers that convert the VSR to aeg barrels to take full advantage of Rhop, IF your guntech isn't comfortable doing an Rhop on a VSR cut barrel.

I am aware of the chambers that allow you to use AEG cut barrels. But this hop up unit is a Tokyo Marui precision chamber.

It is a VSR cut barrel, but it's the type with a hop-up window. It is not a completely open window like GBB pistol barrels. Both will work in a VSR, TM typically ships barrels with this type of window for the VSR10. The "cut" itself refers to the vertical slits that allow the barrel to be retained in the hop-up chamber, and not to the size of the hop-up window.

Thanks Drakker