The 19-year-old defender is expected to make his first start for Scot Gemmill's side in Tuesday's European Championship qualifier against Ukraine after Hearts' John Souttar was ruled out because of concussion.
Souttar was injured in Friday's 1-1 draw with Latvia at McDiarmid Park and has returned to Tyncastle for treatment.
McCrorie, who has become a regular starter for Rangers this season, revealed that he is now recognised as a first-team player at Ibrox.
"That's me moved into the first-team dressing-room," said the teenager, who kept Portugal central defender Bruno Alves out of the side under interim manager Graeme Murty.
"I have made a few appearances for the 21s off the bench, but hopefully I can get my first start and build on that."