Sorry for the topic drift, but...
if you don't need magnification, consider the $50 Bushnell red dot at Academy.
infinite eye relief; mount it where ever you want.
pretty sure they carry it in weaver and tipoff versions.
I have one but its a weaver mount; used it on my 10/22 and 22/45.
if it were tipoff, it would be on my 397.
i vote forward so its not in you way when you pump.