Thanks for the link. It kind of proves I'm not full of it.

I remember using a Hydra-matic in 1967, but a lot of people told me they didn't come out until '69.

Another one that gets me is the Bird Cage Flash hider on the M16a1. My Hydra-matics had the three prone flash hider. We used them to cut the wire off c-rat boxes. You had to twist it a certain way or you'd twist off the flash hider.

I left Vietnam in June of '68 and didn't see the Bird Cage flash hider until I joined the National Guard in '73.

It's all coming back now.