DICE has surely already seen and done a research about the weapons in WW1, but here for everyone who’s interested and wanna have a look just klick on the linkENGLISH
http://en.m.wikipedia.org/wiki/List_of_infantry_weapons_of_World_War_I
http://www.militaryfactory.com/smallarms/ww1-guns.asp
TANKS & ODER VEHICLES
http://www.militaryfactory.com/armor/ww1-tanks-vehicles-artillery.asp
https://en.m.wikipedia.org/wiki/Tanks_in_World_War_I
SERBOCROATIAN
http://www.mycity-military.com/Prvi-svetski-rat/Puske-Prvog-svetskog-rata.html
https://hr.m.wikipedia.org/wiki/Tenkovi_u_Prvom_svjetskom_ratu
GERMAN https://de.m.wikipedia.org/wiki/Militärische_Ausrüstung_im_Ersten_Weltkrieg
TANKS
http://www.panzertruppe.de/Geschichte/1__Weltkrieg/body_1__weltkrieg.html
FRENCH
https://fr.m.wikipedia.org/wiki/Liste_des_armes_de_la_Première_Guerre_mondiale
https://fr.m.wikipedia.org/wiki/Technologie_pendant_la_Première_Guerre_mondiale