Weapon Attachments

Optics/Sights [1x, 1.5x, 2x, 4x, 7x]

Underbarrel Attachments [Smoke Launcher, Explosive Launcher]

Recoil Control [Compensator, Foregrip, Foregrip Bipod, Bipod]

Barrel Attachments [Flash Hider, Suppressor]

Magazine Extensions [Extended Magazine, Drum Magazine]

Laser Sight

Quick Draw Holster

Tracer Ammo

I think sights/optics are the least understood attachments in the game; they can have almost as much impact on your playstyle as your primary weapon. 1x optics don’t provide any additional magnification and are only useful for guns with poor irons sights that obstruct line of sight. 1.5x-2x provide great accuracy at medium range with only marginally increased difficulty at short range. 4x are mainly for long range engagements; they do well at medium range as well but are quite difficult to use at short range. Anything greater than 4x even for Marksman’s rifles is inhibiting considering very long ranges are very rare, those optics are expensive, and they're the hardest to use at short range. I’d highly suggest becoming proficient with your iron sights, if you’re consistently getting into engagements where magnification would be necessary switching to a Marksman role might be worth considering.Smoke/Explosive launchers act like their grenade counterparts with extended range and ever so slightly less effectiveness. Ammo count is influenced by your ammo carrier. These can be well worth it as their total cost per capacity is similar to their grenade counterparts without taking up any explosives slots. Their extended range can make them more flexible than their hand thrown counterparts, and both explode on impact providing quick effect. Launchers allow easy grenading of 2nd floors to impede enemy sight or clear areas. These are not worth using without an ammo carrier due to cost. One of my favorite offensive loadouts is to load up on smokes using the light ammo carrier with the smoke launcher and smoke grenades. Your total smoke capacity goes up to 4 in this configuration.While each of these technically fit into other categories their importance is great enough that they deserve their own section. I would consider having at least one of these attachments almost mandatory for almost any gun. The ability to control recoil with sustained or burst fire is massively important to increasing your lethality. Shots that do not hit their opponent do not stop them, and being able to stop them quickly prevents the enemy from being able to fire back. Bipods offer exceptional stability but aren’t worth it on their own as they’re too situational; they’re provided automatically with the LMGs for the Gunner.The flash hider has some use for players that are going to be playing a role of firing at long range. It prevents the enemy from easily identifying the location of the player. It’s usefulness for shorter range engagements is limited, as sound and line of sight come into play as a way to easily identify an enemy's position. Suppressors mask the sound of firing the weapon it’s attached to; they are a valuable tool but require considerations for maintaining positional ambiguity. Using explosives runs the risk of alerting nearby enemies, and if you carry a sidearm silencing it would be best too. Sprinting from location to location and excessively chatting on the coms is going to make any benefit from the suppressor mute.Drums offer more capacity compared to extended magazines.This allows you to sustain fire for longer between reloads which can help with multiple targets and covering fire. Another benefit is an increase in overall carry capacity as each magazine holds more rounds. While I don’t personally use them much their price can make them well worth it.Laser sights allow you to fire your weapon more accurately from the hip. This attachment is useful for playing run-and-gun but is a little bit on the pricey side for it’s capabilities. I think an experienced player would have little use for it. I would consider this attachment mainly for the Breacher class or filling a similar role.Decreases the amount of time to switch weapons to the pistol. While it is useful the situations where it’ll help you can be uncommon. The length of the gun switch even with the attachment means it needs to be properly timed. Still, it's probably the most useful attachment for any pistol.It helps your teammates tell where your shooting at so they can react to enemy positions more quickly but with the substantial tradeoff of giving away your position to the enemy. I do no think it is ever worth it to equip tracer ammo. It's automatically equiped on LMGs.