At the beginning of the episode, a C-17 Globemaster III is seen at Fuentes' jungle airfield, alongside a few C-130 Hercules. Though some C-130s have been available on the civilian market, the likelihood of a drug (even a highly successful one) cartel buying a $300+ million aircraft without attracting attention is highly unlikely.
When Pena and Stechner are giving the senators a tour of the destroyed 'narco' site in the jungle, one of the senators is shown handling a Galil ACE rifle. This season of the series is set in the late 90s. The ACE model Galil first became available in 2008.