Republican Sen. John Cornyn of Texas has fired off a letter to Attorney General Eric Holder demanding answers about his plan for a $2 million congressional study on "smart guns."

In Holder's testimony before a House Appropriations subcommittee last week, he said the smart gun research is part of a $382 million government package to pay for a "gun safety" program, according to The Daily Caller.

The futuristic firearms would work only through fingerprint identification or by technology that allows only the owner to pull the trigger when connected to an accompanying electronic bracelet, or by wristwatch, as is the case with the 22-caliber, 10-round Armatix iP1, which is available now.

Cornyn, the Senate Minority Whip, wrote in his letter that Holder's plan for potentially forcing people to carry smart guns conflicted with the constitutional rights of Americans.