Thank-you! Sorry, I should have tried that in the first place. It worked...

Hey guys, I'm having a bit of trouble trying to buy the M1 firebird. I am above the rank required. I'm a Warrant Officer 3. I have a little over 10,000 crystals. When I click the "buy" button for the M1 it does nothing. The button is popped out and clickable. It just doesn't do anything. I thought maybe that you had to fully upgrade the original firebird before buying and M1. But, I was informed that it wasn't needed. This is my first time trying to buy and M1 weapon. Thank-you for the help! Megan