Experience: Hajime learned by himself how to fight while in the abyss (a 100 floor labyrinth with dozen of different super monsters with special powers) after he lost his left arm, at the beginning while still a a weak normal human endured more than ten days of hunger and phantom pain, and after the tenth day he began to train himself non-stop
twenty-four seven, and despite how the pain and hunger only grew as time passed his will and transmutation skill also grew at extraordinary rate (his transmutation skill is important because with it he make his weapons), then after satisfy his immediate hunger and find something like gunpowder he began to develop his revolver Donner while focusing so much that he
didn't eat or sleep for days and with thousands of trials. After finally get his revolver he began to advance through the abyss floors while developing his skills and facing a great variety of enemies in different types of environments (which was the specific concept behind the creation of this labyrinth), several times getting close to death and by the end he even had to fight the labyrinth boss with
fatal injuries, with his eye vaporized and while protecting his lover. After that fight he trained for two entire months with Yue, with
training sessions of several hours, while getting accustomed to his new arm, eye and dual gun style while also doing a precision training (will develop this part more in the precision section) which as result caused him to gain
a skill level that no amount of martial arts practice could ever reach (btw he also mastered the art of
gun fu, aerial reload, aerial combat and more). Do to his immense combat experience his body is able to
fight instinctively withou him thinking. Have fought in a great amount of enviroments (the abyss, places were magic is unusuable, inside a volcan in a sea of magma, under water, snowfields, in a place with a mist that affected one senses, etc) agains't a great variety of enemies (which included some bizarre things like giant slime able to regenerate as long there is water and he fought him in middle of the ocean, yeetis that had a combat cented figure skating, a
perfect copy of himself, heck even a ocean of billions of super cockroaches with magic while under the effects of magic
that changed his emotions so he deeply loved the cockroaches and deeply hated his party). Have defeated opponents with several thousands of years of experience like
Miledi (who fought against basically all the world in a era where it was far common that people had special powers, outside of obviously magic since everyone can use that) or
Apostles (who have served as the strongest servants of Ehit for probably tens of thousands of years), in the after stories he also defeated demons from hell (who had thousands of years of experience and could use ancient magic), while super nerfed (was unable to use magic and could only use his two guns)
Mother (two hundred years old super computer so advanced that destroyed by herself an humanity so advanced that could affect space with their technology), and not even a weak after Mother battle fought against several hundreds of thousands apparitions (abstract beings born from the legend through all the worlds which each having their own special abilities based on their conception), he also traveled through most of the nine worlds so in general he have see all sort of worlds, beings and powers (he absorbed and incorporated those things he saw in those worlds to improve his own creations but that don't matter much to the point of this thread). Also, while his main weapon are his two guns, he is also really experienced with all types of other weapons (snipers, machine guns, rocket launchers, chakrams, flamethrower, etc., reason to why he have a super long list of artifacts).
Precision: With his guns he is able to shot down a spell core, which in verse is something that need
extreme precision (to the point that the only other character show able to do that in the verse
left amazed even the Liberators who were incredible genius that left their mark on history, though their current profiles don't reflect that very well but with after apply the recent crt that will change), and he mastered this after his training with Yue when he was getting
accustomed to his new arm, eye and second gun, and was specifically trying not to dodge in a precision training to shot the spell's core of the barriage of spells from Yue. Perfected the art of
midair reloading and gun fu,
can reload while upside down in middle of a somersault, and canonically he can do the
reloads of the dark tower protagonist (don't have the scans at hand, though I remember it happening in Mother arc and the words of the author about getting inspired by the film while searching material). While still in the middle of the abyss could use his
gun recoil to dodge and after the abyss his maneuverability
reached the point of dodge with the minimum amount movement a barrage of attacks from above as thickly packed as raindrops while carrying two persons (he used his guns in this feat so it not only count to his acrobatics but also markmanship). When focusing he can
see the world at slow motion and with great detail. His arms are able to
move independently from each other, with every single move linking perfectly to the next, backed by a level of experience that not amount of martial arts practice could ever reach.
Can ricochet bullets off of various surfaces, thus he can attack from any angle. Is able
to shot Noint's sword in the exact same spot in the entire fight until they broke while also calculating every element of the fight. Can save someone at a distance by
shooting three bullets through twenty enemies using the tiny gaps of them without hitting any of it, this without even looking and while fighting a sea of monsters. Can fight
purely by instincts without think. Do to
grow in middle of combat he stomped a copy of himself after a short time. Can control hundreds (by the beginning of the after stories several thousands) of drones and robots simultaneously with his mind, I mention this part because they have machine guns, missiles and more, so moving all of them concurrently while he himself is fighting he a considerable thing to his precision. And more things but is already late and I don't have those scans at hand to show them, so maybe later I will try to expand this part with some more feats.
Adaptability: As I commented at the end of the previous part is already late, so will make this short. As one can notice with the previous feats and scans Hajime adaptability is quite great, he have adapted to any type of enviroment, enemies and whatever he have faced, he have a
monstrous adaptation and
even after see a spell once he is able to counter it, and while his monstrous adaptability is more notorious with his inventions his own combat skills also grow accordingly as saw in the previous parts (is also thanks to that adaptability that he developed so many abilitites), with even various times in which he
needed to surpass his limits and adapt to what he faced, even while weakened (the entire arc of Mother is an example since he was super nerfed and had only his two guns, which remind me that all the feats of Kouki against Mother also scale to Hajime)
Hajime is comparable (actually above but well) to Kouki so he scale to his feats do to face him and the Mother arc where both were comparable (though again, Hajime was super nerfed), he similarly scale above everything else in the verse as one of the god tiers in skill. Man, would love to show the scans of her 6 years foster daughter becoming a super gunner just by seeing Hajime, the Haulia childs hiting with snipers moving Apostles from five kilometers away, and more things like that to show to what Hajime (and Kouki) scale above but don't have the scans in my computer so later when I get them is that I could post them.