Osageparty

Can you and if so how do you tell the differance between a Bravo 1 lower and Bravo XR lower just by looking at them?

soonenough

Look at the prop shaft. The xr will be larger.

GTOFFSHORE

Plus the xr has a larger bullet.

Mr Gadgets

Look for a blue bearing carrier and the 1.25" propshaft. The cases are the same size unless you look at a very early lower case.
Hope that helps.
Dick