I don't recall ever seeing a 99 with such a groove, and I can't imagine how one might be necessary for use with tangent sights.
My best guess, without seeing it or doing any more research tonight, is that it's NOT original.
__________________
"The gift which I am sending you is called a dog, and is in fact the most precious and valuable possession of mankind" -Theodorus Gaza
Baby Jesus cries when the fat redneck doesn't have military-grade firepower.
|