
The M2 waterproof fuse lighter consists of a metal barrel which holds a firing mechanism, and a base which contains a percussion cap and a fuse retainer. When the striker retaining pin (safety pin) is pulled, the striker hits the percussion cap, which in turn ignites the fuse.
No information about functioning.
Nothing else to see.
MIL-HDBK-146, Fuze Catalog (1982)