TAR 21 with detachable HOLOGRAPHIC SCOPE and IRON SIGHT mechanism

The TAR-21 (or simply Tavor) is an Israeli bullpup assault rifle chambered for 5.56×45mm NATO ammunition with a selective fire system, selecting between semi-automatic mode and full automatic fire mode. "TAR-21" stands for "Tavor Assault Rifle – 21st Century". Since 2009, it has been selected as the standard issued weapon of the Israeli infantry. The MTAR-21 (Micro Tavor) was recently selected as the future assault rifle of the Israeli Defense Forces, and some infantry divisions are being issued with the rifle, replacing the larger, standard TAR-21.

The TAR-21 uses a bullpup design. Bullpup rifles are configured in a layout in which the bolt carrier group is placed behind the pistol grip; this shortens the overall length but does not sacrifice barrel length. The TAR-21 provides carbine length, but rifle muzzle velocity. The bullpup design is also used to minimize the silhouette of soldiers and to maximize effectiveness in turning corners in urban warfare.