Butt is mounted by massive bolt inside.
Stella 518
Technical Specifications
Overall Lenght 910 mm
Manufacturer Kotek Krnsko
Barrel Lenght 360 mm Type piston with break barrel
Sight Radius 345 mm Manufactured Pieces not available
Weight 1,6 kg Production Period 193x-195x
Caliber 4,5 mm

Rear Sight Side View
Rear Sight Top View
Front Sight
Trigger and Trigger Guard

Airgun for children, which was an pattern for airgun Slavia 618. Stella 518 and Slavia 618 are very similiar, but parts are not interchangeable. It is diferrent lenght of recess of cylinder in stock, trigger and connecting bolts positions. Pistons are diferrent too.