|Manufacturer||Tula Arsenal, USSR (*)|
|Caliber||7.62 x 54mmR|
|Action||Semi-Automatic. Gas-operated, tilting bolt.|
|Barrel length||26 3/4", 68 cm|
|Total length||47 7/8", 121.6 cm|
|Capacity||10 rounds detachable magazine|
|Reloading||5 rounds stripper clips|
|Weight||9 pounds, 4 Kg|
(*) The rifle I have access to. Other manufacturers produced this rifle.
The SVT-40 is a gas-operated weapon using a short-stroke, spring-loaded piston.
Note: the springs, bolt cover and handguard have been removed to show the action.
When a round is fired (red arrow), gas is redirected through the gas port (blue arrow), to the gas piston which pushes on the gas cylinder, on the piston rod, on the piston rod extension and finaly on the bolt face (green arrows). The bolt cycles to the back, ejects the spent casing, rearms the hammer, collects another round from the magazine on it's way forward and closes, ready to fire again.
The bolt remains in the back position when the magazine is empty.
If your SVT-40 refuses to cycle (like mine when I got it), you should verify:
The safety (1) is on the safe position if it is rotated down. It simply blocks the trigger from operating.
The picture also shows the magazine release (2). It can be folded flat with the receiver. To operated it, rotated it at a 90° angle with the rifle and push it towards the muzzle. To remove the magazine, rotate it forward.
Typical Russian sights.
The rear sight is a ladder, with graduations from 100 up to 1500 meters.
The front sight is a fixed post.
The trigger release is protected by the trigger release cover. Once rotated it also allows you to line up your cleaning rod with the barrel. You need a long one however. Mine is 36" long and is just long enough.