Getting shot by a BB gun can range from a painful welt that fades in days to a life-threatening injury requiring emergency surgery, depending on where on the body the BB strikes, how powerful the gun is, and how far away you are. The most dangerous misconception about BB guns is that they are toys. Between 1990 and 2000, the U.S. Consumer Product Safety Commission documented 39 deaths from nonpowder guns, and emergency departments treat thousands of BB and pellet gun injuries every year. The reality of these injuries is far more varied and more serious than most people expect.
Why the Outcome Varies So Much
The single biggest factor in how much damage a BB does is how much energy it carries when it hits you. A standard steel BB is 4.5 mm (0.177 caliber), and the guns that fire them range from cheap spring-powered pistols producing a few joules of muzzle energy to pre-charged pneumatic rifles that can exceed 15 joules. An experimental study on porcine skin found that at muzzle energies above about 7.5 joules, a 0.177-caliber projectile can penetrate deep into soft tissue and cause severe, potentially life-threatening injuries. Below that threshold, the projectile can still create wounds several centimeters deep at distances of 20 to 30 meters.1PubMed. Penetration capability of 0.177 (4.5 mm) air gun pellet and the characteristics of the entrance wound at various impact energies between 3.28 – 15.64 J on porcine skin. An experimental study
Distance matters because air resistance slows the BB quickly after it leaves the barrel, but at close range the full muzzle energy transfers into the body. The part of the body that gets hit also matters enormously. A BB striking your forearm might embed shallowly in muscle and cause localized pain. The same BB striking your eye, throat, or temple can be catastrophic. Some high-velocity air rifles produce exit velocities up to 1,200 feet per second, which is enough to penetrate the sternum and damage the heart.2PubMed Central. Homicide Using an Air Weapon
The Most Common Serious Injury Is to the Eyes
Eye injuries dominate the medical literature on BB gun trauma, and for good reason. The eye is soft, exposed, and has almost no natural armor. A BB that bounces off a leather jacket barely noticed can destroy vision if it strikes an unprotected eye. A study reviewing BB gun injuries to the eye found that the overwhelming majority of open globe injuries resulted in devastating outcomes: 15 out of 16 patients had hand-motion vision or worse at their final follow-up, and half ended up with no light perception at all in the injured eye. Twelve of the 16 needed additional surgeries beyond the initial repair.3Ophthalmology Retina. BB Gun–Related Open Globe Injuries
Those are the worst cases, where the BB actually ruptures the eye. Even when the eye is not fully ruptured, the damage can be serious. A twelve-year retrospective study of eye injuries from nonpowder guns found that BB and airsoft guns frequently caused bleeding inside the eye, damage to the retina, and traumatic cataracts. Among all nonpowder gun eye injuries in the study, about 6.5% of patients ended up with vision worse than 20/200, which is the legal threshold for blindness. In eight cases, the eye eventually shrank and became nonfunctional, a condition called phthisis.4PubMed. Incidence and Outcomes of Eye Trauma Associated With Recreative Use of Nonpowder Toy Guns: A 12-Year Retrospective Study
The takeaway here is blunt: a BB gun shot to an unprotected eye has a high probability of permanently damaging or destroying vision in that eye, and surgical repair often cannot fully restore what is lost.
When a BB Reaches the Brain
The skull is thick enough to stop most BB impacts, but the eye socket creates a weak point. A cadaveric study investigating how BBs can reach the brain found that while the thick calvarium (the dome of the skull) generally blocks penetration, the orbit provides a pathway with relatively low resistance. A BB entering through the eye socket can potentially reach the intracranial space and the delicate structures around the brain.5PubMed Central. Orbitocranial Penetration of Ball Bearing Gun Trauma: A Prospective Human Cadaveric Study
This means that a BB gun shot to the face, even one that seems superficial at first, can have neurological consequences if the projectile takes an unlucky path. Children and adolescents, who are the most frequent victims of these injuries, are especially at risk because their skulls are thinner than an adult’s.
Chest and Abdominal Injuries
The chest is another area where BB and pellet gun injuries defy the “it’s just a BB gun” assumption. A report describing three boys who sustained air rifle injuries to the heart highlighted that modern air weapons have enough power to penetrate vital organs, with life-threatening results.6Journal of Pediatric Surgery. Life-threatening air rifle injuries to the heart in three boys In one documented homicide case, a diabolo pellet fired from an air rifle penetrated the sternum, pierced the pericardial sac, and perforated the right ventricle, causing fatal cardiac tamponade. The external wound looked minor.2PubMed Central. Homicide Using an Air Weapon
That last detail is one of the most dangerous aspects of BB and pellet gun wounds: the entry wound is often tiny and unimpressive. A small red dot on the skin with minimal bleeding can mask serious internal destruction. If you or someone else is shot in the chest or abdomen by a BB gun, the wound should be evaluated by a doctor even if it looks like nothing on the surface. Internal bleeding, organ perforation, and pneumothorax (collapsed lung) are all possible with higher-powered air weapons, and none of these will be visible from outside.
What Happens When the BB Stays Inside You
Many BB gun injuries do not result in the projectile exiting the body. The BB lodges somewhere in soft tissue, and the question becomes whether it needs to come out. The answer is: it depends on where it ended up. If a BB is embedded in soft tissue without any joint involvement and cannot be felt through the skin, surgeons generally leave it alone. The body walls it off in scar tissue relatively quickly, and the surgery to retrieve it can cause more damage than the BB itself.7PubMed Central. Gunshot Wounds: Ballistics, Pathology, and Treatment Recommendations, with a Focus on Retained Bullets
But there are exceptions. If a BB sits inside a joint, inside a sinus cavity, or on a weight-bearing surface like the sole of the foot, removal is typically recommended to prevent chronic problems.7PubMed Central. Gunshot Wounds: Ballistics, Pathology, and Treatment Recommendations, with a Focus on Retained Bullets Foreign bodies lodged in the paranasal sinuses, for example, should be removed to prevent long-term complications like chronic sinusitis or infection.8PubMed. Endoscopic management of retained airgun projectiles in the paranasal sinuses
The Wandering BB
One of the stranger and more frightening complications of a retained BB is embolization, where the projectile enters a blood vessel and travels through the circulatory system. Because BBs carry relatively low kinetic energy compared to conventional bullets, they sometimes have just enough force to pierce one wall of a blood vessel but not enough to exit through the other side. The BB stalls inside the vessel’s lumen and starts to drift with blood flow.9PubMed Central. Wandering intravascular air gun BB pellet
A projectile that enters the venous system typically migrates toward the heart and can end up in the right ventricle or the pulmonary arteries, potentially causing a pulmonary embolism. In one documented case, a BB entered the internal jugular vein and migrated not just forward with blood flow but also backward, apparently following gravity, traveling down through the right atrium and inferior vena cava before lodging in a hepatic vein. The potential complication there was venous blockage leading to liver congestion.9PubMed Central. Wandering intravascular air gun BB pellet The same phenomenon was described in the homicide case where a diabolo pellet perforated the right ventricle and then embolized to the left pulmonary artery.2PubMed Central. Homicide Using an Air Weapon
This is not common, but it is a recognized risk with any projectile that enters a blood vessel. It is also one reason why even “minor” BB gun injuries warrant medical attention if the BB cannot be accounted for: if it went in but imaging shows it is not where you would expect, it may have migrated.
Lead Exposure From a Retained BB
Standard steel BBs are not a major lead risk, but many air gun pellets are made of lead. If a lead pellet stays in your body long-term, it can slowly leach lead into surrounding tissue and eventually into your bloodstream. A systematic review of retained bullet lead toxicity found that several factors increase the risk: the pellet sitting inside a joint cavity (where it is constantly bathed in synovial fluid), having a fracture near the pellet, having multiple fragments, and how long the projectile has been in place.10PubMed. Retained bullets and lead toxicity: a systematic review
For a single BB lodged in soft muscle tissue, the risk is low because the body encapsulates it in avascular scar tissue relatively quickly. But if the pellet sits in a joint space, the risk climbs meaningfully. Symptoms of lead toxicity develop gradually over months or years and can include abdominal pain, fatigue, cognitive changes, and kidney problems. If you have a retained lead pellet and develop any of these symptoms years after the injury, lead levels should be part of the workup.
MRI Safety With a Retained BB
If you have a BB or pellet embedded in your body and later need an MRI scan, there is a genuine safety concern. While many air gun pellets are made of lead and are not magnetic, some contain steel, which is strongly ferromagnetic. In a powerful MRI magnetic field, a steel BB can shift, twist, or heat up, potentially damaging nearby tissue. A study testing common air gun pellets found significant variability: lead pellets were safe in an MRI, but steel-containing pellets deflected strongly in a magnetic field.11PubMed. Air gun pellet injuries: the safety of MR imaging
The problem is that you may not know what the BB is made of, especially if the injury happened years ago. Before any MRI, you should tell the radiology team about the retained projectile. They can use X-ray or CT to assess the pellet’s composition and location before deciding whether an MRI is safe.
Who Gets Hurt Most
BB and pellet gun injuries are overwhelmingly a pediatric and adolescent problem. An analysis of U.S. emergency department data found that injury rates climbed from age 3 and peaked at age 13 before declining. In 1999 alone, an estimated 14,300 children and teens under 20 were treated in U.S. emergency departments for nonpowder gun injuries, a number that rivaled the roughly 12,700 nonfatal firearm injuries in the same age group that year.12PubMed Central. Trends in BB/pellet gun injuries in children and teenagers in the United States, 1985-99
A separate estimate put nonpowder gun injuries even higher at about 21,800 in the year 2000, with roughly 4% requiring hospitalization. The introduction of high-powered air rifles in the 1970s was associated with approximately four deaths per year among children.13Pediatrics. Injury Risk of Nonpowder Guns The victims are predominantly boys, and the injuries frequently happen during unsupervised play or target shooting.
These numbers matter because they highlight a gap between how BB guns are perceived and how they perform. Parents who would never hand a child a firearm sometimes give an 8-year-old a BB gun without the same safety instruction, supervision, or protective equipment. The injury data suggests that gap in perception costs thousands of kids a trip to the emergency room every year.
Polycarbonate Eye Protection Actually Works
If there is a straightforward piece of good news in the BB gun injury literature, it is that polycarbonate lenses reliably stop BBs. Testing of common spectacle and safety lens materials found that polycarbonate lenses were not penetrated by BBs at any velocity tested, offering far better impact resistance than glass or standard plastic lenses.14PubMed. Impact resistance of common spectacle and safety lenses to airgun and rimfire projectiles This means that proper shooting glasses or safety goggles with polycarbonate lenses can prevent the most devastating category of BB gun injuries.
There is a catch, though. Already-damaged protective eyewear may not provide reliable protection. Impact testing of polycarbonate safety glasses and facial shields found that even minor prior damage can compromise protection, and multiple layers of protection are advisable when facing flying projectiles.15Laboratories. Impact Testing of Polycarbonate Laboratory Safety Glasses and Facial Shields So using scratched, cracked, or old safety glasses is not equivalent to wearing fresh ones. For anyone shooting or being around BB guns, undamaged polycarbonate eye protection is the single most important safety measure.
What to Do Right After a BB Gun Injury
The first thing to understand is that every BB gun wound to the face, eye, chest, or abdomen warrants emergency medical evaluation, no matter how small the entry wound looks. As the clinical literature repeatedly demonstrates, the external wound often dramatically understates the internal damage. A case report of a 9-year-old who needed emergency open-heart surgery after a close-range BB gun hit to the chest illustrates how quickly a seemingly minor wound can become critical.
For extremity wounds, where most BB injuries land, the injury is more likely to be self-limited. If the BB is visibly embedded just under the skin and you are not near a hospital, do not try to dig it out yourself. Attempting home extraction risks pushing the BB deeper, introducing infection, or damaging a blood vessel. Clean the wound, apply pressure if it is bleeding, and get medical care. A doctor will use imaging to locate the BB and decide whether it needs to come out.
For eye injuries, the most important first-aid step is to not touch or press on the eye. Do not flush it, do not try to remove anything, and do not let the person rub it. Cover the eye loosely with a clean cup or shield (not a flat patch that presses on the eyeball) and get to an emergency department immediately. Pressing on a ruptured eye can cause its contents to extrude, turning a serious injury into a catastrophic one.
Any wound where the BB entered the body but cannot be found on X-ray where it would be expected should raise suspicion of vascular embolization. CT angiography can track the projectile’s path if there is concern that it has migrated into a blood vessel. This is a complication that emergency physicians are trained to look for, but only if they know the wound was caused by a BB in the first place. Always tell medical staff exactly what weapon was involved, because the management of a BB wound differs from that of a conventional gunshot wound in important ways, including the threshold for surgical exploration and the concern for embolization.