I just thought I would send you guys some info on the romak scope rail. Anyone that has built one allready knowes that the rail on the new recievers will NOT fit the scope. you have to file grind or whatever to either the rail or your expensive scope. here is what I have found. the extra rail in the romak kit IS the correct size, the scope fits fine with no adjusting. I put the spare rail on my mini build and a romak typ scope , everything went fine. no grinding. anyone with a romak kit I would save that spare rail as it is a good one.