and not readily available ammo types (.30-40 Krag, .30 Mauser, .44 Russian, etc) as "antique" (26 USC §5845(G)), (27 CFR §478.11) and they are generally unregulated in federal law. They may be bought and sold across state lines without an FFL. The only exceptions are short-barreled rifles, short barreled shotguns, and machine guns, which are regulated under the National Firearms Act of 1934. Unlike C&R guns, antique guns can be re-arsenalized, sporterized, re-barreled, or re-chambered, yet they will still retain their federally exempt status. Even if every part except the receiver is replaced, a pre-1899 "black powder" firearm still qualifies as an antique. FFL holders have been directed not to enter Pre-1899 guns into their Bound Books. Record keeping FFL holders are required to keep a registry of firearms sales in an ATF-approved Bound Book, or a computerized equivalent using ATF-approved software. Licensed dealers must also maintain file copies of Form 4473 or eForm 4473 "Firearms Transaction Record" documents, for a period of not less than 20 years after the date of sale or disposition. When retiring or otherwise relinquishing a license, these records are sent to the ATF's out-of-business Records Center. Licensed collectors are not required to send their records to the ATF when relinquishing their license. The ATF is allowed to inspect, as well as request a copy of the Form 4473 from the dealer during the course of a criminal investigation. In addition, the sale of two or more handguns to a person in a five business day period must be reported to ATF on Form 3310.4. Conditions of application ATF will approve the application if the applicant: Is 21 years or older. Is not prohibited from handling or possessing firearms or ammunition Has not violated the Gun Control Act or its regulations Has not failed to disclose information or facts in connection with his application Has premises for conducting business or collecting The applicant must also certify that: The business to be conducted under the license is not prohibited by State or local law in the place where the licensed premise is located including Local (City & County) Zoning Ordinances and not prohibited by the Home Owners Association (HOA) if any. Within 30 days after the application is approved the business will comply with the requirements of State and local law applicable to the conduct of the business The business will not be conducted under the