Been trying to find info on this online but there is so much misinformation spread around by people who think they know what they are talking about, so basically I can Buy a C02 powered .177 H&K USP replica and I'm fine but if I purchase a gas blowback Airsoft 6mm H&K USP I'm foul of the law (unless I'm registered skirmisher) just curious why the C02 guns don't come into RIF VCR Act?

The closest thing I came to an answer was C02 guns are technically classified as firearms so can't be a imitation because it is a firearm, so don't fall under the VCR Act like Airsoft because Airsoft a're classified as toys. Another answer was the law changed at different times and didn't affect C02 guns.