We've taken our own 74 blanks and completed all of the finish work to make one of the most exciting products for AK74 collectors in years. These receivers come in caliper 5.45 X 39 and you'll appreciate all of the details we've put into every aspect of them. Since we build all of our own products from the ground up the embossment details are all perfect matches to the era and region. Once the receiver blank and rails have been heat treated separately, they are then spot welded together. This is properly following the original factory procedure and eliminates any chance of rust forming between the joined sections.