Unfortunately, these only work with the standard 2-3/4 12GA shot shells. Plus side is you can get up to a 20 round mag as pictured. You can definitely use mini mags with the standard tube fed Shockwave though.

Unfortunately, these only work with the standard 2-3/4 12GA shot shells. Plus side is you can get up to a 20 round mag as pictured. You can definitely use mini mags with the standard tube feed Shockwave though.