The item id for Frost Tactical Bayonet in unturned is 36440. 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.
Size_X: 2
Calibers: 10
Caliber_0: 36002
Caliber_1: 36003
Caliber_2: 36004
Caliber_3: 36005
Caliber_4: 36006
Caliber_5: 36007
Caliber_6: 36008
Caliber_7: 36009
Caliber_8: 36013
Caliber_9: 36015
Blueprints: 2
Blueprint_0_Type: Utilities
Blueprint_0_Supply_0_ID: 36440
Blueprint_0_Build: 27
Blueprint_0_Outputs: 1
Blueprint_0_Output_0_ID: 36011
Blueprint_0_Output_0_Amount: 1
Blueprint_0_Conditions: 1
Blueprint_0_Condition_0_Type: Flag_Short
Blueprint_0_Condition_0_ID: 36013
Blueprint_0_Condition_0_Value: 0
Blueprint_0_Condition_0_Logic: Equal
Blueprint_1_Type: Utilities
Blueprint_1_Supply_0_ID: 36440
Blueprint_1_Build: 27
Blueprint_1_Outputs: 1
Blueprint_1_Output_0_ID: 36011
Blueprint_1_Output_0_Amount: 2
Blueprint_1_Conditions: 1
Blueprint_1_Condition_0_Type: Flag_Short
Blueprint_1_Condition_0_ID: 36013
Blueprint_1_Condition_0_Value: 1
Blueprint_1_Condition_0_Logic: Equal