Single action revolvers are more reliable than semi auto pistols. Does not mean I would want one in a gun fight.
The best gun to have in a gunfight is one that will shoot. While your SDS Imports Lynx 12 semi auto looks like a fun toy or even a decent defensive weapon if you can seek cover and have spent time dialing it in but the fact remains that they do seem to occasionally suffer from a failure to feed problem. One also needs to fiddle with the gas pressures to make it feed more reliably with different loads. The poster is a first time shotgun user and this is not a good choice for a weapon that he can depend on, no matter what. It looks like a fun shotgun to play with and I might get one but your Lynx 12 is not what the poster needs despite its tacticool look .