| Year | 1940 |
| Weapon Type | Heavy Anti-Tank Rifle |
| Origin & Designer | Switzerland/Solothurn |
| Numbers Produced | 24 |
| Crew | 2 (Gunner & Loader) |
| Calibre | 20mm (20x105B) |
| Elevation | [@elevation] |
| Traverse | [@turret_traverse] |
| Breech | Semi-Automatic |
| Recoil | [@recoil] |
| Gun Sight | Telescopic |
| Gun Mount | Tri-Pod |
| Carriage | Twin Wheeled (30 kg) |
| Trailers | [@trailers] |
| Gun Shield | [@gun_shield] |
| Armoured Plate | [@armoured_plate] |
| Barrel Length | 930mm |
| Overall Length | 1.760mm |
| Width | [@width] |
| Height | [@height] |
| Weight | Weight in Traction: 124 kg Weight in Action: 51.7 kg |
| Round Weight | 0.337 kg |
| Muzzle Velocity | 830 m/s |
| Feed | 10 Round Magazine |
| Magazine Capacity | [@magazine_capacity] |
| Practical Rate of Fire | 10 r.p.m. |
| Rate of Fire | [@rate_of_fire] |
| Maximum Rate of Fire | 20 r.p.m. |
| Maximum Ceiling | [@maximum_ceiling] |
| Maximum Ground Range | [@maximum_ground_range] |
| Maximum Range | 2000m |
| Armour Penetration | 11mm @ 500m @30° |
| Traction | [@traction] |
| Variants | [@variants] |
| Notes | In 1936 the Estonian military purchased four Solothurn S18-100 anti-tanks rifles and these were well received by the army and plans were made to adopted the weapon and build their own, without gaining a licence. They managed to build 21 which brought the total up to 25. They were issued to infantry regiments. |