The owner of a Tucson gun store where Mark Kelly recently purchased an AR-15 semiautomatic rifle canceled the transaction because Kelly did not plan to keep the rifle for his personal use.

Doug MacKinlay, owner of Diamondback Police Supply at 170 S. Kolb Road, posted on the store’s Facebook page Monday that he canceled the transaction March 21. A full refund was sent to Kelly via express mail, MacKinlay said.

“I determined that it was in my company’s best interest to terminate this transaction prior to his returning to my store to complete the Federal Form 4473 and NICS (National Instant Criminal Background Check System) required of Mr. Kelly before he could take possession of this firearm,” MacKinlay said in the statement.

Kelly could not immediately be reached for comment. The retired astronaut has formed a political action committee with his wife, former U.S. Rep. Gabrielle Giffords, to lobby for universal background checks for gun buyers. Kelly and Giffords, who was injured in Tucson’s mass shooting on Jan. 8, 2011, are also urging restrictions on the sale of high-capacity magazines.

Kelly has said he purchased the AR-15 to show how easy it is to buy an assault weapon. He said he planned to turn it in to the Tucson Police Department.

Read more on this story Tuesday in the Arizona Daily Star and on StarNet.