Counter Infantry Rifling is especially useful for civilizations that have Royal Guard upgrades for their Skirmishers (French and Germans), or those that have a unique replacement for Skirmishers (Abus Gunners and Cassadores). It helps them counter heavy infantry even more effectively without improving their general stats.
Delivers 1 Carbine Cavalry for each shipment sent so far this game, including this one; unit train time, technology research time, Age up time -10%; costs 250 food, 250 wood
The in-game description is "Skirmishers armed with rifles (Skirmishers, Abus Gunners, Cassadores, Jaegers, Streltsy, Cherokee, Cree) do more damage to heavy infantry (Musketeers, Halberdiers, etc.)".
Counter Infantry Rifling now properly affects Renegados and Thuggees.
Counter Infantry Rifling affects the Pirate's ranged attack when enabled by the Letter of Marque card.
The in-game description is "Skirmishers armed with rifles (Skirmishers, Cassadores, Cherokee, etc) do more damage to Heavy Infantry (Musketeers, Halberdiers, etc.)".
Although it is not listed in the patch notes, with update 13.9057, Counter Infantry Rifling now properly affects Navajo Riflemen again.
Counter Infantry Rifling now increases counter-skirmishers' multiplier against light infantry instead of its usual effect of increasing multiplier against heavy infantry.
With update 13.38085, Nizam Fusiliers no longer benefit from Counter Infantry Rifling.
Trivia[]
Even though the Chinese and Indians do not have access to Country Infantry Rifling, Arquebusiers and Gurkhas get a +1.0 multiplier vs. heavy infantry by shipping specific Home City Cards ("Repelling Volley" and "Royal Green Jackets", respectively), achieving the similar effect as Counter Infantry Rifling.
Even though Fire Throwers are technically not rifle infantry, they benefit from Counter Infantry Rifling, most likely for game balancing. On the other hand, Zouaves and Papal Zouaves do not benefit from Counter Infantry Rifling despite using rifles.