If the Hardened and Prestige editions of Black Ops were to include the Project Nova weapons as bonus content for multiplayer, would it affect the balance of the gameplay? Weapons like the STG44, MP40, and Mosin Nagant would have the same stats as WaW. Attachments would include ones that have a counterpart in Black Ops, such as the Aperture sight for the automatic weapons, and sniper scope for the rifle and telescopic sights. Aperture sight reticle can be customized, but not the color. The telescopic sight replaced the ACOG for the STG44. The Tokarev can have no attachments but Dual Wield, like the ASP.
If these were available only to players who have the DLC codes, would it be unfair? Most weapons in Black Ops are pretty balanced already.