Weapons cache seized

It will take two days to catalog the weapons seized in a gun store sting operation that federal authorities say includes 29 firearms connected to murder investigations.  (Brian Vander Brug / LAT)

Authorities say 897 guns from two stores involved in a sting operation have been used in crimes or found in the possession of criminal suspects over the past five years. Among the weapons allegedly sold to straw buyers are large caliber handguns, Glocks and a semi-automatic rifle.  (Brian Vander Brug / LAT)

An ATF agent examines a weapon seized from Boulevard Sales and Service, a gun store in Compton, where two men were arrested in connection with allegedly selling guns to felons.  (Brian Vander Brug / LAT)

Federal agents examine a weapon seized from a gun store in Compton Thursday morning. Law enforcement officials allege that 14 times within the last eight weeks individuals who identified themselves to store workers as felons were advised by the employee to use a girlfriend or friend accompanying them to purchase the weapon.  (Brian Vander Brug / LAT)

An ATF agent removes merchandise from Boulevard Sales and Service gun store in Compton Thursday morning. Thousands of guns and thousands of rounds of ammunition are involved. Two men were arrested in connection with allegedly selling guns to felons.  (Brian Vander Brug / LAT)

Federal and L.A. County law enforcement officers staged a sting operation at two Southern California gun stores that garnered thousands of weapons Thursday morning. Two men were arrested.  (Brian Vander Brug / LAT)