Africa
URAGAN-5
Complete Mission 16 and go to Bampeve Plantation in the north.
Un-AAM
The Un-AAM can be found in Kzibia Camp, Northwest Guard Post, South Guard Post, Bampeve Plantation, Southwest Guard Post, or in Nova Braga Airport during Mission 21.
MACHT 37
You can get the gunship to drop it potentially in Mission 21. Other than that, head to Kunenga Mine after Mission 22.
Brennan LRS-46
After Mission 23, this will be within Lufwa Valley.
Flamethrower
After Mission 31, you’ll find a blueprint in Munokoya Nioka, or you can get the gunship to drop it during Mission 41.
Antitheft Device
Unlocked after Side Op 8.
Gun-Cam Defender
Unlocked after Side Op 9.
Isando RGL-220
Found in either Ditadi Abandoned Village, South Guard Post, Kunenga Mine, West Guard Post, Munoko ya Nioka Station, Northeast Guard Post, Nova Braga Airport, or South Guard Post.
Stun Grenade
Kiziba Camp in the Northwest of the map, visited in Mission 14. The blueprint is found in a large hut in the middle of the camp.
G44
Ditandi Abandoned Village in the center of the map, visited in Mission 15. The blueprint is within a tent on the eastern side.
Kabarga-83
Found within Mfinda Oilfield.