When the team jumps out of the plane at the beginning of their mission it is clear that they're all wearing ground combat gear, as can be seen from the first shots of the free-fall. However, when they splash down they're all wearing scuba gear.
When the SEAL team jumps from the helicopter, off the coast of Lebenon, they push a deflated and folded up rubber raft into the sea. You next see them in two inflated rubber rafts, each with very large outboard motors on the back of them.
When the SEALs are leaving the seaport with the rescued helicopter crew we see them pause at the bottom of a set of stairs before crossing a narrow lane way. When the camera pans to the roof we see to holes in the concrete slabs on top of the roof. These holes appear when the team sniper, Dane, shots two terrorists behind them. However, this does not happen until about 2 minutes after we see this original screen shot of the team crossing said lane way and they are compromised.
In the opening scene the Navy helicopter's crew chief is captured and taken to the Mediterranean seaport. However in the wedding scene he is standing near the last aisle wearing a leather jacket.
When Hawkins jumps off the bridge, Curran backs up his Jeep to toss the shirt over the bridge. He gets up to the camera and the passenger side taillight lens is clearly broken off. In the next scene where the men leave the church, Hawkins gets dropped off and the guys leave in the Jeep, with the taillight intact. Since Hawkins gets dropped off soaking wet, and since Curran had to get ready for the wedding, there was no time to get the light fixed. The broken taillight reappears as Curran arrives at the restaurant.
During Graham's Wedding the team is paged out to go out on a mission thus ruining the wedding. Every Navy Seal team is put on rotation so they know more or less when they are going out on a mission. Any Navy Seal team member will know this ahead of time, so he would not schedule his wedding around the the same time he's on rotation.
As the Seals escape through Beirut in a hijacked car, Leary carries a Stinger missile but doesn't use it until he has figured out how it works. The Seals regularly train with all types of US weapons and any Seal would be very familiar with the Stinger and its method of use.
A stinger is an infra-red-guided surface-to-air missile. It wouldn't arm or explode if fired point-blank at a ground target.
In the scene where Hawkins chases down a rollback tow truck that has his car, it shows him climbing aboard while it's moving down the road and operating the bed to get his car off of it. This simply isn't possible-the trucks are equipped with a power-take-off that required the transmission be in neutral and it's operated by levers that control hydraulics and not controlled by an electrical switch box. What is more, Hawkins would have had to winch out the cable slightly because you must have a counter-chain at the other end of the car to hold it in place on the bed of the truck or it'd likely fall off.
Before the Seals parachute into the waters outside Lebanon, their planes take off from a base the on-screen text says is in "Northern Cyprus." Northern Cyprus has been controlled by Turkey since 1974 and does not have any American bases.
After the SEALS jump from the plane and HALO into the water, there is a scene where two SEALS approach each other and give the thumbs-up sign. This is not a goof, but recreational divers may think it is. In recreational diving, thumbs up is almost always a sign which means "go up" (surface). Recreational divers circle their index and thumb with the other three fingers extended to show an OK sign. SEALS are not recreational divers and may use thumbs up as an OK sign.
When Hawkins rescues his car from the tow truck and has to spin his car around while going in reverse, it's clear that it is a stunt driver performing the maneuver.
When the RPG is launched at the water where the SEALs are swimming in, a blue circle is visible, marking where the rocket is to hit the water (and, presumably, where the detonation of the explosive charge is to go off).
When Lt. Hawkins is carrying Lt. Curran to safety and the building with the Stingers explodes, you can see the face of the stuntman for Charlie Sheen (Lt. Hawkins).
When the SEAL team arrives in Beirut pulling their inflatable boats ashore it's clearly a stunt double and not Charlie Sheen.
Obvious stunt double for Charlie Sheen when falling to the ground with Curran on his shoulders as Ramos detonates the explosives in the building. Though the double tries to point his face downward to make it unclear, it can be seen during the slow-motion shot of him dropping to the ground as the bombs detonate.
According to the SEAL Legacy Foundation, no Navy SEAL has ever been left behind on the field of battle, dead or alive. Throughout this film, however, several characters of the main cast are killed in battle, and their bodies left behind.
Hawkins slits Shaheed's throat underwater, immediately after which, Shaheed is seen floating away, dead, but there is absolutely no blood coming out of his wound, which would, in reality, be gushing blood very forcefully.
As Saheed drifts out of sight underwater, his blue wetsuit can be seen under his shirt. Earlier that morning, he was established as wearing ONLY the outer olive drab shirt.
There is a yellow bag sitting on the edge of the road on the bridge marking where the stunt man for Charlie Sheen's character is to jump out of the jeep and over the edge of the bridge.
Cameraman reflected in a television screen
When Hawkins jumps from the bridge, he, Curran, and Graham ride through downtown Norfolk, Va., along the Berkley Bridge. When the camera cuts to their conversation about marriage, they're clearly on a different bridge, the Campostella, which is a couple of miles away and does not go through downtown. The camera then cuts back to the Berkley, where Hawkins jumps.
At the beginning of the movie when the men are traveling over the Berkely Bridge on their way to the wedding at Christ's of Saint Luke in Norfolk, Virginia, they are actually heading towards Portsmouth/Chesapeake, Virginia. Christ's of Saint Luke would be behind them, so they are headed in the wrong direction.
When LT. James Curran is talking with Claire in her hotel room at Quality Inn and Suites on Atlantic Ave in Virginia Beach, you can see Navy piers with ships outside her window. Off the shore of the VA Beach oceanfront there are no piers with ships. These piers were at the Norfolk Naval base over 25 miles away.
At the cemetery for her late husband's burial, Graham's widow flinches before the first shot in the three-volley salute is even fired.