Throughout most of Season 2 both the Narcos, Colombian military and paramilitary groups are seen armed with the Galil ACE an Israeli assault rifle which began manufacture in 2008. The series is set in the 1980s.
Throughout most of Season 2 both the Narcos, Colombian military and paramilitary groups have Meprolight Reflex Sights mounted on their weapons. The Meprolight did not begin manufacture until the late 1990s.
Major Wysession is actually a Colonel. Early on in the season, his eagle rank insignia is properly adhered to his uniform shirt collar. Later on, it is woefully misplaced, in two ways. A United States Marine Colonel would never have his rank insignia, or any other medals improperly placed on his uniform.
Handheld satellite phones the size of a Palm were not sold until the mid 1990s. Systems before that needed a antenna bigger than the one on handhelds. The tracking from airplane is right but they are tracking early analogue cell phones.
In several of the airport cut scenes showing aircraft taxiing, the aircraft shown are a Boeing 737-800 and a Boeing 767-300ER. Both these aircraft have winglets on the end of their wings. The first flight of a Boeing 737 model that was fitted with winglets happened in November 2002. The first Boeing 767 model that flew with winglets didn't happen until 2009. In another scene, an Airbus A340 is seen landing. This aircraft first flew in 1991.
A sex scene set in the mid- to late-'80s shows the woman putting on a thong after having sex. Thongs weren't readily sold for another decade. Also, a scene showing the Port of Miami shows mountains in the background, and Miami is so flat, there aren't even hills there! Also, one would think that in a series about Colombia, the name of Colombia's most famous writer, Garcia Marquez, would be pronounced correctly, but the character Steve Murphy mistakenly says "Mar QUEZ" instead of "MAR quez," and mispronounces "Cartajena" with an "enyay" instead of an "en." There are also tons of license taken with characters (Javier Pena is a nerd and not a suave, lady's man in real life; "Jhon" represents Escobar's sicario Popeye who in reality is a ruthless psychopath; etc.) The biggest out-of-sequence flaw is that Murphy and Pena weren't assigned to Colombia until 1988, yet the series has them there at the beginning when Escobar began in the early 1980's. And Justice Minister Lara Bonilla is a true hero of the Escobar tragedy, giving his life in order to expose Escobar's criminal record, and it's a crime that this series tries to claim that the DEA used him to accomplish their mission, when the DEA wasn't even active on the Escobar radar until years later.
During the scenes showing Colombian troops raiding various cocaine labs the soldiers are armed with M4A1 carbines mounted with ACOG scopes. The M4 did not enter front line service with the US military until the early 90s and the ACOG until the mid 2000s. Narcos is largely set during the 1980s.
Many of the weapons carried by the Colombian forces throughout the series are seen with the 'Picatinny Rail' system in place of the carrying handles on their M-16s/M-4s. This series is set in the 1980s and the Picatinny Rail system was not adopted by US forces until the mid 90s.
There's an episode where Colombian soldiers us M4A1 carbines with AN/PEQ-2 laser and IR combo attachments. This weapon attachment was developed only after the end of the first gulf war and first manufactured in the mid 90's.