Yes, the AmeriGlo Haven Handgun Red Dot Sight uses the Trijicon RMR optic footprint which is compatible with the RMR adapter plate included with your PSA 5.7 Rock.
The AmeriGlo Haven Handgun Red Dot Sight is offered with a 3.5 MOA dot (MPN:HVN01), and a 5 MOA dot (MPN:HVN02).
This AmeriGlo Haven Handgun Red Dot Sight uses the Trijicon RMR mounting footprint, so it will fit any slide that has been cut to accommodate RMR optic footprints.
The AmeriGlo Haven Handgun Red Dot Sight could be mounted to a Ruger SR9 using a dovetail mounting plate. The AmeriGlo Haven Handgun Red Dot Sight uses the RMR footprint so you will need a dovetail mounting plate compatible with that footprint. The mounting plate at the link below will work. You will need model number 49540.
https://www.opticsplanet.com/evolution-gun-works-trijicon-rmr-sight-mount-1-780-in-aluminum.html?_iv_gun-make=ruger&_iv_code=KK-RMT-TRJRMR-49540
Please email us at techsales@opticsplanet.com so we can get some more information regarding the issue you are having with the AmeriGlo Haven Handgun Red Dot Sight.