Davin Skirata said:
What do armor ratings actually mean?
I've been doing a lot of research on canon armors like stormtrooper, clone, and even Old Republic armors. All of them were designed to take blaster bolts and keep its occupant alive. Apparently what we've been seeing in all the movies and whatnot are clones and stormtroopers being knocked unconscious from the shock and force of the blast, not them getting burned through and dying (in most cases). And slugthrowers? Not unless you're hitting a joint or the face plate are you harming anyone with a set of military grade armor.
So if standard military armor keeps its host alive even under fire from blaster bolts, do we really need a seemingly arbitrary number system? Can't we just say Yes or no to blaster and lightsaber?
An armor rating of 1 is like wearing plain clothing, it will be torn through by a blaster bolt or lightsaber without any resistance, whereas a quality of 10 is like a suit of beskar that is all but immune to being struck by blasters and such. Stormtrooper armor is generally around a quality of 5, as it is not resistant to a lightsaber, can still be burned through with a powerful blaster weapon, and pierced by a slugthrower, but the reason why stormtroopers in canon were able to get blasted and not immediately be killed or heavily wounded is that they had a special coating that dissipated blaster bolts of standard power.
Nearly all armor is easily penetrated or damaged by slugthrowers due to their lack of use throughout history - the ammunition required is more scarce than normal blaster components and they have a much more limited range and are slower in terms of velocity of the slug used in most cases. Canon armor has shown (and states such in their wookiepedia article) that as weapons fall out of practice that they become more effective because of their lack of use due to the lack of competing technology for something most people do not see.
Standard armor, which is class 3-6, will not normally keep someone alive after sustained blaster fire as they are not immune to blasters unless they are made with a material with properties that specifically resist energy based weapons, such as phrik. You can go further in-depth with your ratings and write out its quality against each type of weapon, such as:
Piercing: 3
Blaster: 5
Lightsaber: 2
99% of armor is not highly resistant to lightsabers as the only armors that can withstand them are made from materials specifically resistant to them due to the fact that there are hardly any materials capable of not being burned through immediately by a lightsaber that are also capable of being used as armor. Durasteel, for example, might save your arm from a glancing blow from a lightsaber, but a direct blow from one will cut through it like butter.
Ratings are there to let both the writer who is utilizing the armor and the opposing writer involved in combat know how they should play out their defenses, simply a yes or no is too black and white.