The TAR-21 is an Israeli Assault Rifle. It was added in the 4.12.0 update.
The TAR-21 is a well-rounded, fast-firing assault rifle with an unusual 1.1x torso multiplier. It trades close quarters damage for better ranged performance, including a 2800 stud/sec muzzle velocity. It can be transformed into the CTAR-21 with a special barrel attachment. However, this versatility comes at a cost, as the TAR-21 has strong recoil that limits its effectiveness in full auto.
Welcome to 2020! There may not seem like there's much to do, but one of the pieces of information that languishes is the weapon pages. Oftentimes, the advanced information for each weapon may change in an update, and this can pass underneath the radar. Investigate weapons, ensure the information for the weapon is up to date, then move to the next weapon. There are a lot of weapons in Phantom Forces, but if you work with other editors, you can get the weapons up to date quickly and efficiently.
As always, if you dont feel like tackling a larger project, there is always housekeeping that needs to be done!