Sportsmatch is the go to brand for air rifles. The RWS 34 is a springer and needs to have a pin in place to stop the rings moving forward due to the spring stopping at the end of the cylinder - Sportsmatch has those by default. Consider buying 30mm as well as one inch because you never know what you might want to try in the future.
Been using Sportsmatch for about 26 years now. First set started on an air rifle and I have used it on various .22 rifles. Each ring-mount in my original set is two screw, i.e. two screws each side of the scope (also two screws clamping to receiver). They are easier to set up than most single screw ring-mounts. They are so well machined that, if your rifle takes the basic 9.5 to-11 mm ring-mounts and the tube diameter /height combination that you require is available in single-screw and twin-screw versions, you can mix and match to get your scope correctly positioned and well secured to your rifle. That is not a feat that I would attempt with some of the other products on the market. YES, a friend and I jointly own a 25,4 mm and a 30 mm lapping bar purchased from Sinclair but they should not be required when mounting directly to a .22 rimfire receiver made in Germany, the former Czechoslovakia or the Czech Republic, to name a few.
To avoid confusion I advise that Sportsmatch always quote true dovetail width, i.e. 15 mm for ZKW 465 / CZ 527 / Brno Model 1 / Brno Model 4 and early Brno Model 2; whereas others may quote 16-17 mm dependent upon width at the top of the cut (which is irrelevant). They also quote 17 mm, as opposed to 19 mm, for ring-mounts to fit: Brno Model 21/22, Brno ZG 47, Brno ZKK, CZ 537 and CZ 550 rifles.
NB Whenever I have made an email query to the company, I have had a prompt, courteous and informative response from the son of the late founder, who has run the company for several years.