The MAC-58 was a version of the AA-52 chambered in .50 BMG. A few prototypes were tested and one retained for preserial production but it never reached production due to the large quantity of US Browning machine guns in service with the French armed forces.
This page contains content from the copyrighted Wikipedia article "MAC-58"; that content is used under the GNU Free Documentation License (GFDL). You may redistribute it, verbatim or modified, providing that you comply with the terms of the GFDL.