These use a friction fit to stay in the up and down position and can wear out over time
The sights should be a snug fit on your picatinny rails and be locked in place with a printed pin. If too tight or too loose for your rail, slightly scale all parts up or down.
Non adjustable.
Will co-witness most standard height optics.
Recommended to print with a very fine layer height. 0.08mm used in print profile.