The Wraith 9/45 Suppressors will fit onto a 5.56 QD Flash hider although they are not okay to use on a 5.56 weapon as the pressures are too high for that model suppressor.
Typically, repairs to suppressors can be turned in less than two weeks. Without knowing your specific issue, I can't give a more specific timeframe.
I'd recommend you phone our sales office at 1-877-892-6533 Mon - Fri 7:30am to 4pm EST or email email@example.com. I want to get you in touch with folks who can better assist you. Sorry for your difficulty to date.