MIL-S-70538A, MILITARY SPECIFICATION SAW, M249 AMMUNITION MAGAZINE ASSEMBLY AND FEEDSTOCK (30 NOV 1994)., This specification covers requirementsexaminations and tests for the SAW, M249 Ammunition MagazineAssembly and Feedstrap. The assembly consists of a magazine witha cover; the feedstrap is not a part of the assembly. (See 6.1)