Although I find the picture above funny, many of these assassins or "sicarios" are very serious "hombres" with an arsenal of weapons that could make any military force envious. They may not look like much to some, but they can do a lot of damage and are very lethal wthout blinking an eye.
Many times they catch active or former police officers in the mix. The most common circumstance is when you have former police officers or soldiers dress in police uniforms with real fully automatic rifles.
Here are a few that were not only made to hold some of the weapons, but they were made to put on some of the fake police uniforms and bullet proof vests. The ones in front who I presume are the leaders look pissed. Perhaps except the ones in the back, even one of them has the police hat backward.