Technical description.
The Tavor TAR-21 is a gas operated, selective fire, magazine fed assault rifle of bullpup configuration. It is available in several configurations, which differ in the barrel lengths and accessories. The basic configuration is the TAR-21 assault rifle with the 460mm (18.1 in) barrel. Next are the compact assault rifle, called CTAR-21, with the barrel 380 mm (15 in) long, and the micro assault rifle, with the barrel of only 250 mm (10 in) long, called MTAR-21. The latter rifle also featured a redesigned front part of the housing, for a more comfortable hold of the short weapon.
TAR-21 utilizes a now-common long piston stroke, rotating bolt action, with the gas piston rigidly attached to the bolt carrier. Gas cylinder is located above the barrel and is completely enclosed by the gun housing. The rotating bolt is similar to one found in the M16 rifle and has seven lugs. The ejection ports are made on both sides of the weapon, and the right or the left side ejection can be selected by installing the bolt with the ejector mounted on the right or on the left, respectively (and, of cause, this change requires the gun to be partially disassembled). The bolt carrier rides on the single guide rod, with the return spring unit located above it, behind and inside the hollow gas piston rod. The charging handle is located at the front left side of the gun and does not reciprocate when gun is fired. The charging handle slots are cut on the both sides of the gun housing, so it can be installed on either side of the weapon, as required. The trigger unit is more or less conventional, with the ambidextrous fire mode selector / safety switch located above the pistol grip.
The TAR-21 has no separate receiver. Instead, all parts are mounted within the high impact-resistant plastic housing, reinforced with steel inserts where appropriate. The access to all the internal parts is controlled by the hinged buttplate, which can be swung down for internal inspection and disassembly.
TAR-21 has no open sights. It is fitted with the standard Picatinny-type accessory rail on the top of the gun. At the present time the standard sighting equipment for the TAR-21 series rifles (except for the STAR-21 sniper rifle) is the Israeli-made ITL MARS, a complicated and expensive reflex-type sight with the built-in laser pointer. For the night time operations the MARS could be complemented with the ITL Mini N/SEAS compact night vision device.
The TAR-21 utilizes the STANAG-compliant, M16 type magazines, with standard capacity of 30 rounds.
TAR-21 in its basic configuration can be fitted with 40mm M203 underbarrel grenade launcher.