The TRG-21 is a bullpup assault rifle used by the FIA. It features an ergonomical design that supports accurate fire in harsh conditions. TRG-21 is lightweight, ambidextrous, easily serviceable and compatible with a large number of accessories. TRG-21 EGLM is mounted with an enhanced grenade launching module. A carbine variant is labeled TRG-20. Compared to TRG-21, it features a short barrel better suited for close quarters combat situations.
Some rumors say the TRG-21 was the AAF's outdated assault rifle. It is rumored that the AAF was having malfunctions with the weapon system, so they bought 25,000 of NATO's outdated Mk20's from the British Armed Forces. The FIA managed to snatch a majority of the discarded rifles during the Altian Civil War.
In the real world there is a sniper rifle called the SAKO TRG-21 based on the TRG-42 design.