Alan, two positions and it is no very stiff due to the nature of the design. Cheers and stay safe!

I've not gotten to shoot one of these, but I did handle one in a local store and the brace was easy to adjust, seemed very smooth, the sights on this pistol didn't seem very good though, id think the sights would be the only thing you'd really need to upgrade, which most will just run a reddot anyways

2 position and easy to move

This only has two positions and from the video I watched doesn't look too stiff. Hope this helps.