Humvees throughout the movie are the original version. Late in 2006 General Dynamics started doing "Up Armour" retrofits in country to the vehicles adding heavier doors and bullet proof glass. Also there were snatch clevises added to the hinges which allowed the doors to be ripped off in emergencies. These should have been shown as the story evolved.
There is a college basketball game on in the bar after Kyle returns home after his final tour. It shows a game with Renaldo Balkman playing for South Carolina. Balkman graduated in 2006, Chris Kyle's final tour was in 2008.
In the bar where Chris meets his wife, Fireball Whiskey is on the bar. Fireball Whiskey didn't hit the bar scene until 2011 or 2012 - at least not where it would hold a spot in the mix of bottles that were poured regularly.
When artillery explosions are going off in the distant background, we see the flash of the explosions and hear the sound at the same time. In fact at that distance, the sound of the explosions would be delayed by several seconds.
Kyle uses a Knight's Armament M110 suppressor, which inaccurately portrays muzzle flashes when fired, even clearly in daylight, which a suppressor by definition is supposed to eliminate. Secondly, a real suppressed shot sounds more like a hard, loud *slap* rather than the *pew* sound as portrayed in the film.
When Chris takes his infant daughter from Taya (after feeding) it is obvious that it is a doll and not a real infant. The baby is crying loudly but the action (or lack thereof) of the baby doesn't match.
When Kyle takes out the man who falls from a roof, the bang is heard before the whine of the bullet and its hit. Since Kyle use a high-velocity rifle, the bullet travels much faster than the sound of the rifle being fired. Hence, the bullet would whine by before the bang.
A trained military man would never point a weapon at another person, whether the weapon is "presumed unloaded" or not, unless he intended to use it. This rule is more fundamental than the rule about never leaving your weapon on the ground.
When Kyle dials his scope up to make his final shot, the cross hairs move up. In reality using the nightforce scope, the crosshairs should have moved down making Kyle reposition the rifle to align the bore and the crosshairs for the longer shot distance. IE crosshairs move down, you must re-aim to hit your target. In reality, the shooter cannot see any movement of the crosshairs as the view is fixed.
When Kyle is in the bar after his final tour. The flag over the bar is displayed incorrectly. The canton is supposed to be to the left as you look at it. The flag over the bar is displayed backwards. And is not proper flag etiquette.
When Chris Kyle meets a man he once saved in the mechanics shop, the camera zooms in on Chris holding his son by the shoulders where a watch is revealed by his sleeve. However the watch which is seen disappears in the next scene and then reappears again, even though their is no real movement of Chris' arms in order to raise or lower the sleeve.
When the SEALs go out on a mission after 'Biggles' is shot, they are attacked by a group of insurgents in a car; after killing the insurgents, one of the HMMWVs crash into the car and then into a wall, fracturing and holing the left front edge of the vehicle and taking a rear-view mirror off. In the same scene when the convoy parked at the target building, the same HMMWV appears undamaged.
Chris sits at the table and Taya joins him and sits on the other side of the table. There is a glass of juice next to the green place mat, but when Taya stands up and moves to Chris, the glass is on the place mat.
After the soldier takes a ricochet round to the face and the team heads out again, the gunners shield has a Punisher style logo sprayed on. In one shot it is black logo on sand coloured background, and in others it's sand coloured logo on black background.
When Kyle is playing an arcade style game and wins a stuffed animal for Taya , the pier can be seen to the right with the ocean's waterline a good 100 yards behind them and they proceed to walk inland. As they continue their conversation, the camera cuts and they are now seen out over the water about halfway up the pier and walking towards shore.
When Kyle is in the Texas tire shop with his son the door he opens has a sign stating "This repair facility is registered with the state department of consumer affairs" and has the seal of the State of California on it.
When Kyle was watching the woman and child through his rifle scope, the camera shows him through the other end of the scope and his eye is magnified. In reality the opposite would happen, making his eye appear smaller.
During the military funeral, the American flag is handed off to the next of kin with the top of the triangle folded flag pointed towards the next of kin. This is incorrect. Proper military etiquette is to hand off the flag with the bottom edge of the folded flag towards the next of kin. Handing off the flag with the tip pointed towards the next of kin is called stabbing and is discouraged within the military honor guard community.
Chris Kyle is shown joining the SEALs after the 1998 US embassy bombings in Kenya and Tanzania, and subsequently gives his age as 30 years old during training. However, the end of the film shows his birth year as 1974, which would have made him around 24 during his training.
The movie strongly implies that Kyle was motivated to enlist by seeing images of Americans killed in terrorist attacks. However, in his memoir, Chris Kyle indicates that he had always intended to join the military after finishing school.
When introducing the enemy sniper Mustafa it is said that he was in the Olympics. It is then explained that he is not Iraqi, he was in fact representing Syria at the Olympics. Later we see Mustafa in his home and there is a photo of an Olympic medalists podium in the room.
In reality Syria has had only 1 Gold medal in Olympics history and it was won by a female in Athletics. Syria has only 2 other Olympic medals - in Wrestling and Boxing.
Incorrect "Airborne" tab on uniform sleeve of Army shooters from the 75th Ranger Regiment. Though a unit on active jump status, the 75th Ranger-Scroll does not have have the Airborne tab attached to the uniform.
The woman / child attacking the Marine tank and infantry unit with a grenade are using an RKG3 anti-tank grenade. The slow motion scene shows the grenade spinning in flight before hitting the ground. In reality this grenade has a parachute that is deployed in order to stabilize it in flight before hitting armor, and it does not spin.
During the final main battle, which takes place in 2008, a U.S. Army soldier is killed by a Dragunov sniper rifle fired by Mustafa. The bullet goes clean through the soldier's body armor, when the SAPI plate in the vest should have been able to stop the round.
During the funeral service, one of the Navy personnel in the funeral detail is wearing an Expert Shooting Ribbon on his right side. This is incorrect as he should be wearing the Expert Shooting Medal on his left side and awards that do not have an associated medal are worn on the right side in the form of a ribbon.
When Kyle, off duty visits a comrade in the VA hospital, he's wearing a ball cap. As a Navy SEAL, and CPO, he would know this is a serious breach of protocol. In the Naval services, a cover (hat) is not worn in medical facilities, or in the galley, out of respect of the wounded and dying, except in very rare circumstances and on duty.
At an auto body shop, a young Marine who approaches Kyle talks about how he's made the country proud, and then salutes him. Being a Marine himself, the young man would have known to not salute men in civilian attire and especially not an NCO despite knowing Kyle was a CPO.
During the beginning of the movie, you see an M1A1 Abrams tank go by with with no side blast panels. This is wrong as the M1A1 models all have blast panels all along the side over the wheels in order to protect them from attack. And actually every model M1 has them since the birth of the model in 1979. This is probably because the M1 Abrams depicted here is actually and older tank (probably M60 or M48 ) disguised as an Abrams, since there's a shot where the underside is visible and it is rounded instead of flat like an Abrams should.
At about 1:47 into the movie, during the firefight after Kyle kills Mustafa, Kyle is shown multiple times leaning over the top of the building shooting. Well after the start of the firefight, and after he uses his M4, the ejection port cover is closed and then pops open when he fires a shot. The cover would have been opened at the first shot fired, and it's unlikely that he would have closed it in the middle of a fight.
The SEALs go out on a mission to 'avenge' Biggles after he is hit on 3 HMMWVs, with an Army M113 Armored Personnel Carrier leading. In another book, Kyle wrote that on this mission, they went out on 2 Bradley Infantry Fighting Vehicles.
The film portrays Kyle as a tortured hero who pays a psychological toll for his actions in Iraq. He is shown crying after killing a woman and later leaves the service because the strain becomes too much for him. This is false. The real Chris Kyle said that he loved killing Iraqis and only regretted that he hadn't killed more. He left the service not because of the psychological toll it took on him but because of the strain it put on his family. Kyle said a number of times that if he had been single he would have returned to Iraq "in a heartbeat".
When Chris first Meets Taya in the bar scene, she first tells him her sister was married to a seal. She then says to Chris, "I'd never date a SEAL." Chris starts to walk away and she asks, "Where you going?" He says, "Well you said you'd never date a SEAL." She then says, "I said I'd never marry a SEAL." She never said I'd never marry a SEAL she just said her sister was married to a SEAL. However, Taya at first said that she'd never date a SEAL because she said that they're all full of themselves. Then, after Kyle explains to her that he's not full of himself because he'd lay down his life for his country, and Taya asks why, and Kyle told her that it was because it's the greatest country on earth and he'd do whatever he can to protect it, she liked that about him. So when Kyle started to walk away because she said that she'd never date a SEAL, Taya stopped him and changed her comment to she'd never marry a SEAL. Notice the smirk on her face when she changes her statement.
Kyle and Taya's babies are obviously prop dolls. Although the daughter doll's hand was CG-animated to move while Sienna Miller was holding it, Bradley Cooper can be seen subtly moving its arm with his thumb to make it seem like it is moving. The filmmakers acknowledged this after numerous reviews noted the fake baby, with screenwriter Jason Hall saying, "Real baby #1 showed up with a fever. Real baby #2 was [a] no show."
While on a night mission, Kyle and marines entered an Iraqi's home and were invited to stay for dinner. The lights were on in the kitchen. There was a large window with its curtains wide open exposing everyone to sniper fire. The curtains would have been closed upon entering the kitchen.
Near the beginning of the film when the soldiers were being driven through a street in Iraq, the Arabic sign of a coffee shop is visible. A few seconds later, the same sign is seen again giving away the fact they they were going in rounds in a set made to mimic an Iraqi street.
During some nighttime raids, just before entry into a lighted room, some of the actors had their night vision goggles (NVGs) set way too low on their face so that it was obvious they were looking "over" the actual tubes. In reality, you adjust the goggles so when you flip them down they sit right in front of your eyeballs.
When the Seal snipers are going on a mission to provide cover for Marines on patrol early in the movie, the first "Marine" out of the transport vehicle was wearing on his left shoulder the patch of the US Army 1st Cavalry Division, not a US Marine unit.
When they were interrogating the sheikh, his pronunciation of Arabic was quite off. The actor playing the role is Iranian whose native language is Persian, therefore he was reciting foreign language words when speaking in Arabic.
The goof items below may give away important plot points.
At the end of the film, Chris Kyle's son is playing a Skylanders game with an Xbox One controller. In the film, this scene takes place on February 2, 2013, while the Xbox One wasn't released until late 2013.
After Chris shoots a man that tried to fire an RPG at the vehicle near him, a boy picks up the RPG and aims it at the vehicle before dropping it. He drops the RPG to his right, quite away from the dead man's body. In the next shot, as the boy runs away, the RPG is right beside the dead man's body.
The movie depicts Mustafa as a major adversary for Kyle and credits Kyle with killing him. In reality, Chris Kyle had only heard rumors about Mustafa and in his memoirs says that another soldier killed someone who was believed to be Mustafa.
The movie depicts Kyle's longest range confirmed kill as sparking a firefight which caused Kyle to become disillusioned with his service. In reality, Chris Kyle's longest confirmed kill was against an insurgent armed with a rocket launcher and sparked no such firefight.