Hello and welcome from the UK and from The First Bull Run/ Manassas Forum
As to your request that is a rather open ended one. What type of 'Confederate gun'? Also I'm afraid to say it but there are an awful lot of fakes out there as well as genuine items that have unscrupulously had the word Confederate attached to them. That said this is the place to validate or otherwise what you have for we have some true experts amongst our members and I would guess some of them will be along shortly. If not I would in a few days post more information (preferably with pictures) in the Weapons and Ammunition Forum where they tend to hang out.