HEY TROOPS! M.A.S. 35 S Magazine arrived Wed. lots of surface and finish wear otherwise nice and it fit. The 3 parts that comprise the magazine release for a M.A.S. 35 A arrived today from Numrich [Total cost $26.50] Fit and worked like a charm so as to the question posed in my original posting... ANSWER- A M.A.S. 35A MAGAZINE RELEASE ASSEMBLY WILL WORK ON A M.A.S. 35S! Hope this helps someone in the future!!! Jerry