Technical Details

STG58C Standard Model

(Other models similar)

1. Weights:

a) Rifle without magazine: 9.8 lbs.;

c) Filled magazine: 1 lb. 9.74 ozs. (bullet 9.30 grams = approx. 144 grains);

2. Lengths:

a) Overall length: 43";

3. System of operation: Gas.

4. Method of feed: 20-round magazine.

5. Position of feed opening: underneath the body.

6. Position of ejection opening: right side of body.

7. Position of cocking handle: left side of body.

8. Position of charging lever: left side of trigger frame.

10. Backsight graduated from 200 to 600 meters, in 100 meter steps (or in yards).

11. Rifling of barrel: number of grooves: four; twist: righthand; pitch: 1 in 305 mm (1 in 11.9").

STG58C Diagram




Standard Model Shown

1. Method of functioning. This weapon is gas-operated. Gas intake is controlled by means of a regulator, which ensures regular and smooth functioning, without excessive recoil. The bolt carrier is mechanically locked before firing can take place; in addition, unlocking cannot take place until the bullet has left the barrel.

As the bolt carrier must necessarily be in the forward position when firing takes place, accuracy is not affected by the forward movement of a fairly heavy mass, which is one of the draw-backs of many semi-automatic weapons.

After each shot, the mechanism extracts the spent case and feeds another round into the chamber; this operation continues so long as there are any cartridges in the magazine. When the magazine is empty, the bolt carrier is held to the rear, which lets the operator know that he must reload.

2. Stability. By placing the gas cylinder above the barrel and careful attention to design, the center of gravity of the weapon has been placed in line with the barrel axis. The tendency of a weapon to move upwards on recoil has thus been eliminated with the ZeroClimb muzzle brake on this rifle, as compared with most existing types. This stability enables the operator to keep his sights trained on the target without difficulty.

3. Method of feed. Feed is from a 20-round magazine, housed beneath the receiver. Arrangement of cartridges in the magazine is staggard.

4. Sights. These consist of:

• An aperture backsight, graduated up to 600 meters (or yards), fixed to the rear part of the trigger frame,

• A well protected front sight, mounted at the forward end of the gas cylinder.

• The line of sight is very low, which allows the shooter to keep under cover when firing.

5. Gas regulator. This is designed on the exhaust principle, i.e. the regulator only allows sufficient gas to ensure correct functioning to penetrate into the gas cylinder; surplus gas is vented outside the weapon. This system prevents undue wear on the mechanism and keeps fouling to a minimum.

6. Stripping and assembly. Stripping and assembly for normal cleaning and maintenance can be done with special tools. For the usual cleaning, it is sufficient to take out the magazine, gas plug and piston and the bolt assembly, after removing the top cover (fig. 1). The bolt assembly and the cover can be removed very easily. The weapon opens like a break action shot-gun, i.e. the butt is hinged to the body and the rifle swings open to give access to the mechanism. The return springs, encased in the butt, requires minimal maintenance and should be cleaned manually by the user.

Fig. 1

WARNING: Visually confirm that chamber is empty of cartridges prior to cleaning or disassembly (Fig. 11).

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