Colonel rank Omega shirt.
The item id for Omega Top Colonel in unturned is 3529. You can use this ID with the commands below to spawn the item, give it to a player or buy it on a modded economy server.
Useable: Clothing
Size_X: 3
Size_Y: 2
Size_Z: 0.6
Width: 6
Height: 3
Armor: 0.9
Blueprints: 2
Blueprint_0_Type: Apparel
Blueprint_0_Supply_0_ID: 3529
Blueprint_0_Product: 66
Blueprint_0_Products: 3
Blueprint_0_Build: 32
Blueprint_1_Type: Repair
Blueprint_1_Supplies: 1
Blueprint_1_Supply_0_ID: 66
Blueprint_1_Supply_0_Amount: 3
Blueprint_1_Build: 32