The dealer is CDNN Sports, located in Texas. (
www.cdnnsports.org).
Their credit card processing account was canceled, and some $75000 in funds embargoed because First Data Corp., which operates Citi Merchant Services apparently thought that CDNN was selling handguns over the Internet and sending them directly to buyers who used credit cards to pay for the purchase. In truth, payment was made with credit cards, but shipment went from one federally licensed dealer to another. Citi had a previous history of being anti-gun, and refused to back down even after the circumstances of making a perfectly legal sale was explained to them.
The National Shooting Sports Association (NSSA), which represents the firearms industry, got involved, and now CDNN has a new credit card processor that is either pro-gun or neutral on firearms issues. A lawsuit against Citi Merchant Services may or may not be in the works, but it is under consideration.
Meanwhile a substantial number of firearms related business have switched away from Citi Merchant Services while a large number of individuals have cancelled their credit cards, both on principal and because many firearms related businesses might have to decline payment from a purchaser that was buying a firearm using a card where the payment was processed by Citi Merchant Services. It is quite possible that some or all of the cards you have were issued by banks or whoever that use Citi Merchant Services to process the transactions.
What you do as an individual is up to you, but if you choose to cancel any cards or accounts be sure that the issuer or account provider knows why you are taking the action.
As a side note, I understand that Citi now plans to split off Citi Merchant Services from their regular banking and other divisions.
If you want to learn more about CDNN, go to their website (see the above link) and download their catalog. Firearms are only listed in their print catalog, which you can order at no charge.