Weapon condition system feature - Argentum mod for Half-Life 2

1. Each weapon has its own condition parameter. It reduces when you use that weapon, or if it gets damaged by something (explosion, for instance). It is crucial to its performance, because reducing condition makes weapon jam more often and slightly reduces its damage output, also that is the only parameter that actually increases weapon spread (not counting the heat, about which you can read below)

2. The jamming aka misfire. A weapon always has a chance to jam when you shoot it (before you shoot it, as it can be cartridge non-chambering as well), and when it occurs, you need to fix it (press and hold some special button for 1-5 seconds), also there is a chance that you get the "heavy" misfire, which takes longer to fix (usually from 5 to 20 seconds, so its better to switch to your secondary or drop your gun and replace it with some other) and is usually quickly recognisable because of its special sound effect. On certain weapons, light misfire can also be fixed via reloading, and heavy can as well destroy gun completely.

3. Weapons, dropped by dead npcs, have random condition (but, for instance, guns dropped by combine elites usually will have it better). Weapons, that are spawned on the map always have it at 100%, so its preferable to take them instead, as long as we dont have a weapon cleaning kit.

4. Heating. Each shot heats weapon, and heat increases condition loss when shooting, while also reducing accuracy. When it reaches 100%, weapon becomes unable to shoot and needs some time to cool down (much quicker in water). Also you cannot fix heavy-jammed weapon when its very hot, and switching it will burn a little. The heating factor by default is something important for impulse weapons (ar2 and impulse machine gun) and not as dangerous on conventional weaponry, however it still affects accuracy.