Charles Cooke at National Review looks at the burden of applying for and purchasing a permit to own a firearms and the cost of obtaining a voter ID.  Of course, most states have made the ID required to vote free to those who need an ID.  

I am not especially bothered about voter ID one way or another, but the hypocrisy here is spectacular, the product of a combination of cynical and calculated base-manipulation and the ever-present attempt by contemporary left-wingers to make up for not having been born at the time of the civil-rights movement. In New York City, an ID costs $10 (or $6.50 if you are elderly or unemployed). Meanwhile, a permit to purchase a firearm — a constitutional right, remember — is around $420, and, of course, you need an ID just to apply. On the logic of the anti-voter-ID crowd, this means that those who have trouble getting IDs (for whatever reason) are effectively deprived of the right to bear arms and that, given how expensive and time-consuming the process is, the poor are shut out even if they have identification cards. This is not a trivial comparison. Black Americans have historically been systematically deprived of the right to bear arms, so the laws in New York City can, on critics’ own logic, be construed to be continuing this problem of access. Suffice it to say that I am yet to see a disparate-impact case launched by the Department of Justice.