Weiss will be in the Rangers squad for their trip to Old Trafford.
And his Cup-tied teammate Nikica Jelavic says: "I have played against Vladimir and with him, and think he is an excellent player. He is very good at supplying the strikers with ball from midfield.
"We have many players in the team who can link up with strikers as we saw when Kyle Lafferty sent in a great cross for me to score against Hamilton.
"But, as is the case with most strikers, I like to play with a winger and Vladimir is one of the best I have played with.
"Like many of the players in the team, Vladimir has played in England before and he will be comfortable going to Old Trafford."