Corrext hand guards?
 

I inherited this Sp1 several years back and I was looking around and could not find one of this age with round handguards. I think that's it's about a 1974 issue . The serial number begins with a 42****. I was wondering if it came originally with a teiangular handguards. Here's a pic

Thanks

Attachment 50399

yes those are correct style for that time if im not mistaken.