>>16242270
<IRL examples for context.
A bargain bin (400-600 dollars on the American market) AR-15 with a cheap pencil barrel, non free floated handguard, carbine length gas system and iron sights.
>With good ammo it will do fine as long as the irons are zeroed for that particular round. With a mishmash of ammo it becomes inaccurate as there is no consistency, and possibly jam because one of uncle Jimmy's 80 grain bolt action only projectiles won't feed properly. As it gets used harder and harder, things like bolt heads break rendering it unusable. It's irons begin to cover up more and more of the target the farther away the shooter is from the target. And the longer it's fired rapidly (not even on full auto) it's accuracy gets worse as the barrel heats up. Due to the gas system being made for a 14.5 inch barrel and not the 16 inch barrel that it has, recoils harder. Gun is slower to swing because your supporting hand is behind more of the barrel's mass. Trigger is cheap and gritty, throwing off your shots as it seems to break at different points with each trigger pull. Cheaper barrel may have a 1-9 twist rate which won't properly stabilize heavier projectiles leading to a severe loss in accuracy.
Medium tier (600-1000 dollars on the American market) AR-15 with decent internal parts, a medium weight barrel, a free floated handguard, midlength gas system, and an okayish red dot.
>With good ammo it will be putting rounds in a 2 inch circle at 100 yards, standard plinking ammo is more like 4-5 inches at the same distance. Shooter has better target acquisition due to red dot not taking up less space than the irons, allowing for better distance shots and situational awareness. Harder and harder use can cause some parts malfunctions eventually. Barrel can keep it's accuracy tighter for a bit longer but takes a bit longer to cool down. Flash hider can make the shooter less of a target in low or no light situations. Mid length gas system allows for better gas expansion and softens recoil. 1-7 twist rate in the barrel won't properly stabilize lighter projectiles, imparting too much spin and causing the rounds to go off from point of aim. Will take longer for vital parts to break but it will happen with hard usage. Easier to swing as the longer handguard gives you more leverage on the heaviest part of the gun. Red dot can fail after hard use or forgetting to change the battery after 2 weeks of leaving it on.
High tier (1100-2000 dollars on the American market) AR-15 with premium internals, an amazing barrel that can be anywhere from 1/3 to 1/2 of the total price of the gun, midlength gas system, lightweight and nearly full length free floated hand guard, and a quality red dot.
>With good ammo, you're getting 1 inch groups at 100 yards, with premium ammo you're getting in the sub inch groups at that distance. Mostly the same as the medium tier but longer lasting parts that will handle rougher usage. Red dot has a 5 year battery life on the medium setting and the rifle can land on top of the optic after being dropped 40 feet, and not be rendered unusable. 1-8 twist means it can stabilize light and heavy projectiles fine, different chamber specs means better accuracy.
Legendary tier (2000-4000 dollars) Competition AR-15 for people that make a living off of shooting fast and accurately.
>Sub 1 inch groups but only with high grade or premium ammo. Custom gas system that only likes a particular weight of projectile/powder load. Variable magnification optic that may have a red dot mounted on it as well, the optic might cost as much as the gun. Will not jam due to it's construction but will due to shitty mags or using the wrong ammo for it. Custom buffer and aggressive muzzle brake that keeps the gun level during firing without pushing the nose down. This is a glass cannon, as long as everything is right it will work flawlessly.
No developer could sell such a system to a publisher, as suddenly it isn't in simple and easy to understand statistics. I dumbed it down by not going into things like buffer weights and springs or adjustable gas blocks. And those examples are just for one family of intermediate caliber lead spitters. You need to have a basic understanding of firearms and what they shoot to make a tier list that requires breaking down every single major component of each firearm to adjust values for. It also requires a jamming mechanic in the game. And I've yet to see a game that makes a double feed malfunction or stuck case malfunction and clearing mechanic that doesn't just indicate the gun is going to explode soon.