The Striker is a SMG in Modern Warfare 3 (2023) and Warzone.
The gunsmith contains all kinds of attachments that improve various characteristics of the Striker. After a bit of testing, this set of five is perfect for close and mid-range combat:
Up first is the Striker Recon Long Barrel, which provides the only improvements to damage output in addition to a reduction in gun kick.
The pairing of the Bruen Heavy Support Grip and the FTAC G-5 Exo drastically reduces any recoil that could stop your shots from hitting the target. With hardly any recoil, they're excellent for keeping high accuracy in hectic gunfights.
With movement receiving a huge increase in speed in Modern Warfare 3, the Lachmann MK2 Light Stock is the way to go, thanks to even further enhancements in movement and sprint speed.