Intended to improve infantry anti tank role (pretend SMGs don't exist for a moment). To be researched in barracks. Was intended to compliment my 1 turn tankette and heavy tank adjustment balancing idea but there was a great lack of interest in it.
Italy:
Swiss made anti tank rifle purchased and used by Italy.
Default Solothurn S-18/100 Italian anti tank rifle
To Solothurn S-18/1000 Italian anti tank rifleman Tech
Germany:
Default PzB 38 German anti tank rifle
To PzB 39 German anti tabk rifle Tech
Russian:
PTRS-41 and PTRD-41 are very similar and used around the same time. The PTRS was actually designed a bit earlier, so I suggest setting it as default Russian ATR infantry. The PTRD was simpler and used longer without significant upgrades. I think it was even used as a Sniper.
Default PTRS-41 Russian anti tank rifle (was designed earlier but produced in 1941)
To PTRD-41 Russian anti tank rifle Russia anti tank rifle Tech
Japan:
Japanese ATR was old and they didn't make any upgrade. I suggested moving the 45-mm Type 5 recoilless AT weapon to industry 2 to compensate for Japan's lack of anti tank rifle upgrade because weapon itself had low ranged and penetration. The other anti tank weapon the Japanese had was the Lunge Mine AT stick but that didn't seem like a good upgrade for Japanese ATR.
Default Type 97 automatic cannon Japanese Anti tank
To 45-mm Type 5 recoilless anti-tank weapon Tech (produced in 1945)
British:
Default Boys anti tank rifle MK 1
To Boys anti tank rifle MK 2
US:
US didn't have any anti tank rifles during the war. Drejade said US used Browning MG as their light anti tank weapon.
France:
The French only had the currently in game prewar 37mm anti tank gun, as well as the British ones. They should follow British anti tank rifle tech upgrade.