

The assault rifle is powered by cartridges from a box magazine with a capacity of 30 rounds. This flag-type safety device is located below the fire translator and in the position at the letter "F" blocks the trigger. The rifle is equipped with a safety device against accidental shots. For automatic fire, the translator must be moved to the right by the letter "D", and for single fire - to the left by the letter "E". The fire translator is located in the trigger box, and its ends extend outward on the left and right sides. The trigger mechanism allows for single and automatic fire. The Stg.44 could be equipped with an active infrared sight "Vampire", as well as a special curved device Krummlauf Vorsatz J, designed for firing from tanks (and other shelters) at the enemy in the dead zone near the tank. On the muzzle of the barrel there is a thread for attaching a rifle grenade launcher, usually covered with a protective sleeve. The sector sight, the fuse and the fire mode translator are independent (the safety lever on the left above the pistol grip and the transverse button for selecting the fire mode located above it), the bolt handle is located on the left and when firing moves together with the bolt carrier. The stock is wooden, attached to the receiver with a transverse pin and removed during disassembly a return spring is located inside the stock (thereby excluding the possibility of a simple creation of a variant with a folding stock). The receiver is stamped from steel sheet, and the stamped USM unit, together with the pistol grip, is pivotally attached to the receiver and folds forward and down for disassembly.

The barrel was locked by tilting the bolt downward, behind the liner in the receiver. The Stg.44 submachine gun was a weapon built on the basis of an automatics with a gas engine with a long stroke located above the barrel of a gas piston.
