<page_title> M40 rifle </page_title> <section_title> Comparison </section_title> <table> <cell> scope <col_header> Differences </col_header> <col_header>  </col_header> <col_header> Weight (w/scope) </col_header> <col_header> Overall Length </col_header> <col_header> Barrel Length </col_header> <col_header> Barrel </col_header> <col_header> Lands and Grooves </col_header> <col_header> Rifling </col_header> <col_header> Stock </col_header> </cell> <cell> Unertl 10× with US Optics upgrade Schmidt & Bender 3–12×50 M8541 <col_header> Differences </col_header> <col_header> M40A3 </col_header> <row_header> scope </row_header> </cell> </table>
The M40 rifle's M8541 Scope is a Schmidt and Bender 12×50.