MKEK acquired german machineries to manufacture weapons as many middle-eastern industries did (as DIO of Iran and POF of Pakistan). The G3A7 is a turkish copy of the german HECKLER&KOCH G3A3 battle rifle. It fires the 7'62x51mm NATO cartridge, feeding from a 20-rounds magazine. It features a S-1-20 trigger group, a fixed plastic buttstock, and an "old-style" ventilated handguard. It is the standard battle rifle for the Turkish infantry. Please note: BATTLE RIFLE, not ASSAULT RIFLE, since is no more in use by the most of the turkish armed forces, and is retained only by some units due to its major punch compared to the 5'56-NATO cartridge.
Photo and information from: PIERANGELO TENDAS