
The M2A1 equipment destroying incendiary is similar in construction to the M1A1 safe destroying incendiary but is smaller and has only, two fuzes. It is designed solely for the purpose of destroying a single item of classified cryptographic equipment which is.made.of.plastic and wire and is housed in a special container. It is issued only for the purpose for which it is designed and only as directed by the Assistant Chief of Staff, Intelligence. This incendiary is a metal box, 16 inches long by 8 1/2 inches wide by 1 inch deep, filled with 8 1/2 pounds of TH1 thermite and fitted with an M210 incendiary fuze and an M209 electric floating smoke pot fuze. (Early production models contained an electric squib and an M201A1 igniting fuze instead of the M209 and M210 fuzes.) Two cellulose acetate cups filled with first-fire mixture are embedded in the filling, one directly under each fuze.
TM 3-300, Ground Chemical Munitions (1956)