[Not a Spoiler, things that are not explained in the Manga based on the WN]
Well, there are still many who do not understand Hyce's abilities.
His ability level is Master which allows him to quickly find out the mechanism, strength and how to use the weapons used.
The power of the weapons summoned and used by Hyce is strengthened (in terms of attack power and explosion) from the original weapon.
His weapon's ammunition is unlimited.
The attack and explosion effects of the weapons used by Hyce have no effect on Hyce (for example, if he uses a missile or grenade on himself he will not be hurt) only affect other creatures besides himself.
The number of types of weapons increases over time when he explores the mechanism of his weapons (there is an ancient book left by Nobunaga, a human from Japan who helped him).
When his abilities evolve not only handle weapons, all types of tools and combat vehicles from Warships, Fighter Planes, Helicopters, Tanks and others can be summoned and used. How great is our MC's "Weapon/Gun Master" skill