I think that you've got the wrong issue here. It's not a Felony conviction that was critical to Mr. Kelley's federal firearm's disability. It was his conviction for a misdemeanor crime of Domestic Violence that created the disability.
Having said that, I do have a question for the lawyer members of the forum. According to media reports, Mr. Kelley was convicted by a Special Courts Martial of several offenses carrying penalties of more than a year's confinement. However, under the MCM, a Special Courts Martial cannot impose more than a year's confinement, effectively making it a misdemeanor court. The federal law (18 USC 922) imposes the so-called "Felony" firearms disability upon those who were convicted of crimes carrying more that a year's imprisonment as a penalty. The way the law is worded, it's the maximum penalty that a person was liable to, not the penalty that they received, that counts. If Mr. Kelley was convicted of a crime carrying more than a year as the penalty, but was convicted by a court that could only impose a year as the penalty, is the disability triggered?