Jоse Guadalupe Hernandez appeals his jury conviction in the Western District of Texas on three counts of firearms violatiоns. We affirm the conviction on one count and reverse the other two.’
In May, 1980 agents for the Bureau of Alcohol, Tobacсo and Firearms (ATF) learned that Hernandez had made multiple purchases of handguns and ammunition. This information was provided on forms submitted by several firearms dealers in El Paso, pursuant to federal regulations. 1
On July 9, ATF agents responded to another call from an El Pasо gun dealer informing them that Hernandez was purchasing handguns in his store. Although the agents arrived at the store after Hernandez had left, they subsequently observed him purchasing ammunition at another store, and then watched as he concealed a sack under the hood of his car. Hernandez was arrested crossing the Stanton Street Inter *291 national Bridge to Juarez, Mexico, with three firearms under the hоod of the car and one in the glove compartment. He was indicted and convicted for violation of 18 U.S.C. § 922(a)(1) (count 1) 2 ; 924(b) (count 2) 3 ; and 22 U.S.C. § 2778(b) and (c) (count 3) 4 . Sentеnce was five years on count 1, five years on count 2, and two years on count 3. The sentences are concurrent.
Hernandez attacks his conviction on count 1 on the basis that the evidence was insufficient to prove he was engaged in the business of dealing in firearms without a license. However, the proof showed conclusively that appellant had no license, purchased thirty guns from dealers in El Paso during a four month period and sold them for a profit in this country and Mexico. This evidence amply satisfiеd the definition of dealing in firearms.
United States
v.
King,
The government urged in its brief that we employ the concurrent sentence doctrine in the event Hеrnandez’ conviction on count 1 was affirmed. The doctrine may be stated as follows: the existence of one valid conviсtion may make unnecessary the review of other convictions when concurrent sentences have been imposed.
United States
v.
Rubin,
The concurrent sentence doctrine is above all a rule of judicial convenience,
United States
v.
Rubin,
United States v. Davis,
We affirm Hernandez’ conviction on count 1 and reverse on counts 2 and 3.
AFFIRMED IN PART, REVERSED AND REMANDED IN PART.
Notes
. Under 27 C.F.R. § 178.124 (1980) a licensed firearm dealer must record sales to unlicensed persons. Where multiple sales are involved (two or more handguns sold within five days), a report must be forwarded immediately to the ATF. 27 C.F.R. § 178.126a (1980). These regulations implement 18 U.S.C. app. § 1201-03, dealing with unlawful possession or receipt of firearms.
. 18 U.S.C. § 922(a)(1) provides:
(a) It shall be unlawful—
(1) for any person, except a licensed importer, licensed manufacturer or licensed dealer, to engage in the business of importing, manufacturing, or dealing in firearms or ammunition, or in the course of such business to ship, transport, or receive any firearm or ammunition in interstate or foreign commerce.
. 18 U.S.C. § 924(b) provides:
(b) Whoever, with intent to commit therewith an offense punishable by imprisonment for a term exceeding one year, or with knowledge or reasonable cause to believe that an offense punishable by imprisonment for a term exceeding one year is to be committed therеwith, ships, transports, or receives a firearm or any ammunition in interstate or foreign commerce shall be fined not more than $10,000 or imprisoned not more than ten years, or both.
. 22 U.S.C. § 2778 provides:
(a)(1) ... The President is authorized to designate those items which shall be considered as defense articles and defense services and to promulgate regulations for the import and export of such articles and services. The items so designated shall constitute the United States Munitions List.
(b)(2) Except as otherwise specifically provided in regulations issued under subsection (a)(1) of this section, no defense articles or defense services designated by the President under subsection (a)(1) of this service may be exported or imported without a license for such export or import ....
22 U.S.C. § 2778(c) sets a penalty оf not more than two years imprisonment, or $100,000 fine or both for “willful” violations of the statute.
. In
Cardona,
we adopted the approach of the D.C. Circuit in
United States
v.
Hooper,
. The government charged Hernandez with violating 18 U.S.C. § 924(b) to-wit: transporting with intent to commit the crime of willful exportation.
