He could withstand firearms but was not completely bulletproof. He had regenerative capabilities so even if he withstood heavy fire, he was injured only for minutes.
Because of the thickness and strength of the Hulk's skin, it's nearly impossible for any form of artillery to hurt him. Sure, everyone's seen bullets bounce off of the Hulk, but when we say he's bulletproof what we really mean is he's BULLETPROOF.
Adamantium is one of the few metals that can pierce Hulk's skin. Normal bullets merely impact against his skin like a 9mm round against an inch of steel plating.
She-Hulk is still able to withstand bullets and many weapons, but swords and blades can cut her easier than they do the Hulk. While Hulk can withstand Human Torch's greatest blasts, Jennifer can only withstand up to 3,000 degrees Fahrenheit.
Banner, driven to the brink once supposedly took out a gun and tried to shoot himself in the mouth. He transformed into the Hulk and spit out the bullet.
While the Avengers debated who could wield the Infinity Stones and save the universe, Hulk was ultimately the one who was deemed strong enough to survive reversing Thanos' snap.
Due to the gamma radiation that birthed him, his skin is nearly indestructible and takes massive force to break. Throughout Hulk's many on-screen fights, he has only bled twice, and both circumstances prove it takes a unique set of variables to accomplish that.
Swords, knives, and more have been used against Hulk and almost none of them even leave a scratch or mark on him. However, with that said, there are two bladed weapons that can cut into Hulk's skin. Adamantium is something that can cause damage to Hulk.
Traditionally, adamantium has been able to stand up against the brute, making the X-Men's Wolverine one of the Green Goliath's most formidable threats. The feral mutant initially debuted as an adversary to the monster in Incredible Hulk #181 (by Len Wein, Herb Trimpe and Jack Abel).
Gamma Mutate Physiology: Due to Bruce Banner being exposed to the Gamma Bomb's radiation, culminating in his transformation into a powerful monster, the gamma radiation mutated the Hulk's body and fortified his cellular structure, adding over 800 lbs of bone marrow and muscle tissues to his body.
Banner's plan seems even more reckless than usual. First of all, as he admits, there is no guarantee that this will kill Hulk. The Immortal Hulk series has established that the Hulk is functionally immortal, and he can survive even after Banner dies, which is exactly what scares the scientist.
It was only after this transformation that Hulk could wield the Infinity Stones and reverse Thanos' snap, saving the universe. Smart Hulk became a huge MCU hero in the process, but it came at a cost. Using the power of the six Infinity Stones severely damaged his right arm, just as it did to Thanos.
The Avengers and Fantastic Four died to stop him. During that ultimate sacrifice, Hulk also died. Jean Grey shut down Bruce Banner's brain, turning Hulk into a savage. The two ended up separated, and Hulk ended up in an irradiated cocoon, one that killed Hulk completely, which led to a new Hulk being horn.
Despite his immense power, the Hulk has been defeated by heroes like Wolverine, Iron Man, Puck, and the Punisher. Spider-Man, Fantastic Four, and the Thing have also managed to take down the Hulk using their intelligence, teamwork, and unique abilities.
While his mind would be wiped of his friendship with the hero - and he would reencounter him in Planet Hulk and on the Avengers - Hulk will always be haunted by his greatest friendship turning into one of his darkest moments as a hero. Hulk was afraid of The Void not just because of his powers, but what he represented.
There's no question the Hulk is a near-indestructible force who comes out on top in almost all of his battles of pure strength. However, against Superman, he's outmatched. While Hulk's strength might rival that of the Man of Steel, Superman's other abilities give him a considerable edge against his opponent.
According to the Watcher, the reason for the Hulk's rage is the fact Bruce Banner's persona lies buried within him, desperate to communicate, eager to escape, yet forever imprisoned.
While Bruce is working at a bottling facility for some drink he gets cut and some of his blood goes into one of the drinks. The poor man who consume the drink is none other than Stan Lee, who has an incident.
Bruce explains that Hulks metabolize alcohol at an incredible rate and thus cannot get drunk, thus their drinking sessions are, "All buzz, no barf." The "buzz" experienced while consuming alcohol is a stage of drunkenness. If they cannot get drunk, they cannot get a buzz.
The soft-spoken scientist's blood is infused with gamma radiation, allowing him to transform between being a human and being a ferocious green machine. However, it's possible that the gamma radiation in his blood also prevents him from being able to have a child with someone.
However, part of what allows Hulk to be forgiven for the massive destruction he causes is the shockingly small death toll of his frequent rampages. In fact, according to Marvel lore, Hulk has never directly killed an innocent, whether battling the military or tearing down Avengers tower.
