The 20-year old is beginning to make his mark at Ibrox after two loan spells elsewhere.
“Barrie’s application has been first-class, he’s worked hard and his commitment has never been in question, so he deserves to be playing and he deserves to be part of the squad, there’s no doubt about that,” said Warburton, in an interview with the Herald Scotland.
The 20-year old has spent the past two seasons away from Ibrox, first on loan at Morton and then Raith Rovers last season.
The spritely attacker was in no mood to leave again this term and clearly demonstrated enough in pre-season to warrant a place in the new gaffer’s plans.
While Warburton is pleased with McKay’s contribution so far, he has acknowledged that maintaining his form is now key if the young Scot is to continue with his progression.
“I’m delighted for him that his hard work is paying off,” he added.
“His big challenge now will be consistency. He’s shown what he can achieve week-in week-out so far, and now he has to keep showing that on a consistent basis… If he can do that then he’ll have a real big impact for the club going forward.”
McKay has emerged as a key component of a Rangers side that have bagged 14 goals in their first four league games, and have shown no sign of letting up.
The potent combination of youthful exuberance – provided by the likes of McKay and Nathan Oduwa - and wise old heads in the form of John Eustace and Kenny Miller has brought a great balance to Warburton’s side, and it’s hard to see who can stop them on current form.