The record of your arrest may still be on your record. It does not matter in your situation. Only convicted felons are barred from purchasing firearms. A CHL can be denied for recent Class A and B misdemeanors, but this is not relevant to you. You should have no problem buying a rifle or shotgun.
Brian Tyrone is a licensed Texas attorney. Any answers I provide are not intended to be legal advice, nor do they establish an attorney-client relationship. Because there is no attorney-client relationship established by any answers I provide, you should consult with a licensed attorney in order to understand your legal rights and responsibilities.