The Light Blues boss has added goalkeeper Cammy Bell, Nicky Law, Arnold Peralta, Jon Daly, Stevie Smith and Nicky Clark to his squad for their forthcoming Second Division campaign.
But McCoist is still on a quest for new blood, telling RangersTV: "I'm delighted with the signings we have made.
"We would still like to strengthen, especially in the centre back area - that would be ideal. When you look back to last season we were very light up front at times.
"We have brought in big Jon and Nicky who are proven centre forwards and hopefully will prove to be good goal-scorers for us too.
"I would still like to add another body in that area but these two will certainly strengthen the striking department.
"We have Nicky Law and Arnold Peralta who will strengthen the middle of the park - although Arnold is not with us yet due to World Cup action with Honduras - so we are in reasonable shape.
"Hopefully we will get Arnold over shortly so that he can have a look at the place and the players and also have a look around for a place to stay.
"Then we will let him have a few weeks off to spend time with his family because his fitness is fine as he has been playing over the summer."