Experimental PTR RES anti tank gun from 1942. 20 mm bullet was based on 45 mm casing, that gave it velocity of around 1300 m/s with roughly 60 mm of penetration at
iMac vs 20mm Anti-Tank Rifle [video]
Reinforcements at the Battle for Moscow - Noticias - Enlisted
Anti-tank rifle - Wikipedia
Rifle, Anti-Tank, .55in, Boys "Boys Anti-Tank Rifle" - Tank Encyclopedia
world war two - What damage did anti-tank rifles hope to inflict on tanks in WW2? - History Stack Exchange
The 'Elephant Gun' from Finland: The 20mm Lahti L-39 :: Guns.com
Walfas Weapons: Lahti L-39 Anti-Tank Rifle by RED-IMPRISONER on DeviantArt
Anti-Tank Rifle Concept for the Sniper : r/tf2
How a Boys anti-tank rifle works - YouTube
Anti-tank rifle | Gun Wiki | Fandom
PzB.38 PzB.39 - Modern Firearms
Can a man-portable anti-tank rifle be perfected to a level that could tackle modern armour? - Quora