The STG 44 is a modern version of the Sturmgewehr 44 which was a German-made assault rifle used during World War II and considered the first of its kind. The GSG STG 44 is a .22LR model with a metal receiver and wood Stock - Caliber: .22 lr HV - Overall length: 946 mm - Overall heigth: 220.5 mm - Weight: 4.2 kg - Barrel length: 414 / 420 mm - Rifling length: 406 mm - Number of grooves: 6 - Sight length: 435 mm - Trigger pull: 2.500 g / 25 N - Magazine Capacity: 25 - System: Semi-Automatic