I got you...

in my sights.

This is a M15 Grenade launcher sight, leftover from WWII. A good idea in principle, although reportedly not the best invention in practice...the link tells the tale.

Don't worry, it's INERT

This old thing is exactly what it looks like. It's a hand grenade. It's from WWII. It's Japanese. It's a Type 97 fragmentation grenade. It's unused (duh!). It's also inert.

There is a sticker with Kanji on the bottom, but I can't read it. Can you?

Anyway, I always flash back to that scene in that old movie Private Benjamin, wherein the drill instructor says something like the following during basic training:

"Beware... there are mine fields out there. Most of them are inert. However, some of them are ert."

Hysterical.