it's a monster dovetail (bigger then standard rifle dovetail)
there are actual specific DE scope mount rings for it.. and also there are kits that mount to the barrel with 20mm rail on top ...
Vancouver Island Gun Doc, custom builder.
Leader - M.E.R.C. multi enviroment recon CAVALRY
The Cavalry Comes
"SIR!, you've gone mad with power!"
"Ofcourse I have, you ever gone mad without power, it's useless, no one pays any attention"