Harris Bipods

[wildcard]

I'm trying to determine the difference in Harris Bipods so correct me if i'm wrong. I know that one version is friction lock and the other is leg notches. Here's where i'm confused a bit since I don't know if the leg notches I fondled was a Harris.

Friction locks: Legs RETRACT when the button is pushed.
Leg notches: Legs EXTEND when the button is pushed.

Is this correct?

[grammaton76]

I believe it's correct. I have leg notches on my bipod, and they definitely extend when the buttons are pressed.