AK-47 rifles with gold parts are seen at the military zone of Mexico City, May 6, 2011. Guns belonging to drug gangs that have been modified may be retained for analysis while those inlaid with gold and expensive carvings often end up in exhibitions. Brigadier General Antonio Erasto Monsivais, the general in charge of decommissioning weapons seized from drug dealers, estimated around 70-80 percent of all arms seized were melted down and turned into everything from industrial hardware to sculptures. Usable weapons that conform with military regulations are sometimes given to the army. REUTERS/Jorge Dan Lopez (MEXICO - Tags: SOCIETY CRIME LAW)