HK21/Attachments

==Call of Duty: Black Ops==
===Optics===
HK21 Red Dot Sight BO.png|Red Dot Sight
HK21 Reflex Sight BO.png|Reflex Sight
HK21 ACOG Scope BO.png|ACOG Scope
HK21 Infrared Scope BO.png|Infrared Scope
===Other===
HK21 Extended Mag BO.png|Extended Mag
HK21 Extended Mags Reload BO.png|Reloading with Extended Mag