The Gers meet Celtic at Hampden Park in the Scottish Cup on Sunday.
Barrie McKay believes that Rangers' experience of beating top flight opposition this season should give Mark Warburton's men plenty of confidence that they can beat Celtic in the Scottish Cup semi-final, the Daily Mail reports.
The Old Firm pair meet at Hampden Park on Sunday to decide who will face either Hibernian or Dundee United in the final. And while it is the Scottish Premiership leaders that will go into the clash as favourites, McKay explained that the Gers' results against those in the top tier should give the Scottish Championship side the belief that they can knock Ronny Deila's men out of the competition.
"We definitely believe we can do it. Just because you are in a lower division doesn't mean that you can't beat the teams in the higher league," he told the Mail.
"We've already done it this season and so have Hibs, so that difference in division doesn't really mean anything on the day."
As well as beating Kilmarnock and Dundee during earlier rounds in the competition, the Light Blues will be enjoying the high of securing a league and cup double in the past week and will be looking forward to potentially taking themselves to within one game of securing a treble.
While the Hoops will present a different challenge entirely to the likes of Killie and Paul Hartley's side, the manner with which they defeated the two teams will give them confidence that the step-up is not as big as it seems.
After defeating Kilmarnock on their own ground, they stormed into the semi-final by thrashing Dundee 4-0 at Ibrox. And while it is highly unlikely that they will manage a similar scoreline against their bitter rivals, that victory would have surely made the Bhoys sit up and take notice.