The young Gers have overcome Spartans and Stenhousemuir in the previous rounds and will be looking to take the scalp of the League One side in Greenock.
It means 17-year-old Mason Munn starts between the posts, supplementing a backline of Jack Harkness, who makes his first start since May, Greig Allen, captain Johnly Yfeko, and Robbie Fraser.
Arron Lyall will anchor the centre of the pitch, with Paul Nsio and Connor Allan tasked with providing energy and creativity in a more advanced midfield role.
It’s a fluid attacking trio at the top end of the pitch as 2006-born duo Zak Lovelace and Archie Stevens will be supported by Ross McCausland.
Among the substitutes for the Light Blues this evening will be Alfie Halliwell, Zander Hutton, Jamie Newton, Leyton Grant, Kerr Robertson, Findlay Curtis, James Graham and Chris Eadie, while Darren McInally returns to the matchday squad for the first time in over a year following a lengthy injury lay-off.
Kick-off at Cappielow Park, supported by Dalrada Technology, is 7:45pm and the ticket office will be open for cash sales.
RANGERS B: Munn, Harkness, Allen, Yfeko, Fraser, Lyall, Allan, Nsio, McCausland, Stevens, Lovelace
SUBS: Halliwell, Hutton, Newton, Grant, McInally, Robertson, Curtis, Graham, Eadie