I'm an Army brat and my father served 28 years in the Army with tours in Korea and Vietnam. He used to bring home c-rations on several occasions and we would eat them. I really liked the peanut butter! I eventually got a key ring when I started driving I guess around my sophomore year. Ever since I've had a key ring, I've had a P-38 on it and carry it always. Don't use it very often, but when you need it, it is great to have with you. I also use it as a screw driver on occasions in a pinch.
Here is a picture of my P-38 I've carried around for the past 40 years. I thought I would throw in the tool I got a few years ago from a member of the Seecamp Forum. Seecamps are finicky with ammo and they recommend certain brands of ammo for their guns. I carry the .32 as a bug always. I also have the .380 with a custom serial number, but rarely carry it. One of the things that seem to cause problems with ammo is the inconsistent OAL of the bullet. If the ammo is over the recommended OAL it is more likely to cause FTF's and stove pipes. The tool shown is a gauge that can be carried on a key ring to help measure the OAL of a bullet. That tool rides right next to my P-38 on my key ring.