I have a US 30 carbine with a SKS scope mount that replaces the rear sight. It is 3.25 inchs long. I want to use it for small hogs at close range and as a home defense type gun. I have a red dot on it but was thinking about a Eotech or short fixed power scope. If you have this scope mount which scopes have you tried. I hear the longer Eotechs will not fit it. Thanks