Here's a list of weapons I believe COULD be available once 0.13 comes out. It's speculation using some educated guess work from pictures shown through out the year(s) on twitter and Instagram. Who knows what surprise weapons await for us in patch 0.13!!!
AK-12 (We have various AK-12 parts already mentioned in the game / text – possibly could be replaced with AK-19?? Your guess is as good as mine.)
AK-15
AK-308
HK-417 (has been teased for a while – is mentioned on some weapon mod text – counter part to AK-308)
Steyr Aug
SR-2 Veresk
Chiappa Rhino 40DS
Chiappa Rhino 60DS
RSh-12
SR-3 ‘Vikhr” (Far over due to get a VAL upgrade or more guns in the 9×39 caliber)
DSR-1 / .308 and .338 versions (Lightkeeper trade)
Barrett M-82 sniper rifle (Lightkeeper trade)
RPG-7 (Lightkeeper trade)
RPG-30 (Lightkeeper trade)
PKP “Pecheng” machine gun (Lightkeeper trade or possible scav boss weapon)
PKM machine gun (Lightkeeper trade or possible scav boss weapon)
RPD machine gun (in game model shown back in 2019 or 2020 I believe – can't find it now)
Landmines (Lightkeeper trade – one or many versions)
UBGL’s (Lightkeeper trade – one or many versions)
Any weapons you think I'm missing or should be subtracted? This will be the biggest update to EFT in the history of the game and is supposed to be the "crown jewel" of Tarkov per the devs. What say you?!?