Complete the following special objectives in single player mode to unlock the corresponding item:

Electric Lock Pick: Primary objectives in JBA HQ 1.
EMP Device - Enhanced: Primary objectives in JBA HQ 1.
EMP Grenade: Secondary objectives in the Iceland Assignment.
EMP Grenade - Attachment: Secondary objectives in the Cozumel Assignment.
Explosive Sticky Camera-Attachment: Secondary objectives in the Iceland Assignment.
Frag Grenade - Attachment: Primary objectives in JBA HQ 3.
Gas Grenade: Primary objectives in JBA HQ 1.
Gas Grenade - Attachment: Secondary objectives in the Cozumel Assignment.
Hacking Device - Force Hack Upgrade: Primary objectives in JBA HQ 2.
Hacking Device - Software Upgrade: Secondary objectives in the Shanghai Assignment.
Night Vision - Enhanced: Primary objectives in JBA HQ 3.
Shotgun Shell - Attachment: Secondary objectives in the Okhotsk Assignment.
Smoke Grenade - Attachment: Secondary objectives in the Shanghai Assignment.
Sonic Grenade - Attachment: Primary objectives in JBA HQ 2.
Ultrasonic emitter: Secondary objectives in the Ellsworth Assignment.
Wall Mine - Flash: Secondary objectives in the Okhotsk Assignment.
Wall Mine-stun: Secondary objectives in the Ellsworth Assignment.