I see that many of us have/had a Mauser Broomhandle as well as a Luger...
I was searching eBay for a C96 Broomhandle rear sight assembly, and found this...It was described as a "M24/30 FN MAUSER PART, CARBINE REAR SIGHT"...
The dimensions are identical; the sight markings are different; the slider indices are different...but it fits and works fine in my Broomhandle slide!!!
A good alternate to the C96 sight, which is getting hard to find...
(It also fits homemade artillery Luger sight bases)...