I too have the same gun as dirtdobber(post # 3) serial #921926. I need a locking block. None of your available schematics looks like this gun as far as the locking block on mine, I have the origional manual....I have scanned the schematics and would like to know how to send to you as you suggested above....a pic. Is there no way to cross reference serial #s on these various Charles Daly..aka Akkar, KBI, Sarsilmaz etc guns? This is making me crazy!!