It does not. Only real limit on shotties is no folding stock on semis, and no revolving cylinder magazines.
That said, OP... don't buy that one. It's a Saiga 12 in a trashy bullpup stock. The MKA-1923 bullpup has a MUCH better design, albeit I can't vouch for reliability. Also has mags that can take MKA-1919 extensions, which is pretty cool.