A class action is a particular form of litigation used to collect money damages or financial restitution when, based on the same facts, a large group of people have suffered what to each of them is a relatively small economic loss. It is useful because it provides a way to pool a lot of small dollar claims, each of which would be economically impractical to pursue individually. A class action can become viable when the aggregate of the pooled claims reaches a sort of economic critical mass, making the remedy financially feasible.
A class action form offers no strategic or tactical advantage for RKBA litigation.
In fact there are over 70 RKBA cases currently pending in various stages in federal courts around the country. None of them are framed as class actions, and doing so would offer no advantage.
"It is long been a principle of ours that one is no more armed because he has possession of a firearm than he is a musician because he owns a piano. There is no point in having a gun if you are not capable of using it skillfully." -- Jeff Cooper