The karabinek szturmowy wzór 1996 Beryl (English: assault rifle model 1996 beryllium) is a Polish 5.56mm assault rifle, designed and produced by the Łucznik Arms Factory in the city of Radom. The rifle is to replace the 7.62×39mm AKM and 5.45×39mm FB Tantal used in the Polish Armed Forces. Development Development work on a new service rifle (both a standard and carbine variant) adapted to use the intermediate 5.56×45mm NATO cartridge had been undertaken in 1995, however a functioning 5.56 mm rifle and carbine variant had already been available in Radom since 1991, known as the wz. 1991 (a rechambered wz. 88 Tantal rifle). The new weapon's specifications were approved in February 1995 and in December the same year, a prototype production batch consisting of 11 Beryl rifles was produced. In 1997 the weapon had been successfully evaluated and adopted into service as the 5,56 mm karabinek szturmowy wz. 1996 ("assault carbine pattern 1996"). The Beryl subsequently became the standard Polish rifle. In 2011, there were more than 45,000 in the inventory, accounting for about half of the assault rifles in the Polish Army. On May 25, 2016, FB "Łucznik" Radom announced an order from the Polish Army for 26,000 Beryls and Mini-Beryls, though did not break it down by system. Apart from Poland, 80 wz. 96A Beryls and 10 wz. 96A Mini Beryls are used by Lithuania (donated in May 2000 by Poland, including 10 rifles with Pallad grenade launcher and 10 rifles with CWL-1 scope with integrated laser rangefinder). Until 2002/2003 they were equipment of a special forces unit SOJ Aitvaras, operating in Afghanistan. Design The Beryl's design layout and system of operation are similar to those of the Tantal rifle, and the principal differences, resulting primarily from using a different cartridge, include the following components: the barrel, receiver housing, buttstock, foregrip, muzzle device, sight system and magazine. With an adapter, it can use M16 NATO standard magazine. The 457 mm-long barrel, has six right-hand grooves and a 228 mm (1:9 in) twist rate. The barrel's external profile (from the breech to the front sight base) is identical to the Tantal's barrel, but the length from the foresight base has a visible tapered contour with a decreasing diameter towards the muzzle end, used to mount a flash suppressor. The flash hider can be used to mount and launch rifle grenades. The flash hider has a slight taper at