Nils Koppen is working quickly through his shopping list with another signing announced before the transfer window is even open. Clinton Nsiala will arrive when his contract officially expires with AC Milan with international clearance the only stumbling block before the French born defender arrives at Ibrox to join Philippe Clement’s squad rebuild. Rangers have pulled off something of a coup in signing such a ‘huge talent’ and someone who had a lot of clubs vying for his signature. READ MORE: Rangers transfer history from 2016 to presentRangers edge AC Milan as Clinton Nsiala makes transfer d…