Can someone please tell me what this is

Heres link to youtube video. Help me identify this. Its military: youtu.be/uDm7Q9RlwT8
found at flea market its approx 9" long by 5" in diameter. Any info with pics or proof of what it is would be awesome thanks.

These are the nose plug and nose adapter for the SUU-30 series dispencer. have a look at the drawing of the dispencer over here. designation-systems.net/usmi … s/u-s.html