In addition to brand-new weapons, there are four new weapon attachments coming to Call of Duty in the Season 4 update.

You can see more details about these below, with descriptions written by Activision.

G-Grip (Launch)

Supported weapons and how to unlock: SMGs (except PP-19), Assault Rifles, Battle Pass Page 7 Reward

Vertical foregrip with integrated laser for improved firing stability, horizontal recoil control, and tightened spread when transitioning between hipfire and aiming down sights. Beam: Blue. Blocks Laser attachments.

Stryder .22 3-Round Burst Mod (Launch)

• Supported weapons and how to unlock: Stryder .22 Pistol, Event Reward

Convert the Stryder .22 into a 3-round burst. Drastically improves fire rate and maintains manageable gun kick but alters the weapon’s damage profile outside of the effective range.

SVD Full Auto Mod (In-Season)

• Supported weapons and how to unlock: SVD Sniper Rifle, Event Reward

Convert the SVD from semi-auto to full-auto functionality, ramping up the speed of your damage output and drastically improving recoil and handling.

TR2 CQB Auto Conversion (In-Season)

• Supported weapons and how to unlock: TR2 Marksman Rifle, Event Reward

Alter the TR2 Marksman Rifle to fire handgun caliber rounds, resulting in a Marksman Rifle with a compact frame and fully automatic capabilities that rival fire rates of an SMG.