Roller Locks on the other-hand are still serving in 1st line capacity and expected to do so well into the future.
https://www.military-today.com/firearms/mg3.htm
https://stateofguns.com/mg3-machine-gun-1586/
The MG3 is short recoil operated and striker-fired, with a roller-locked bolt carrier, and fires from an open bolt.
https://www.military-today.com/firearms/mg3.htm
Bundeswehr still uses MG3 as a universal machine gun in all possible roles: handheld, with a bipod, mounted on armored vehicles, military navy machine gun (for defense against fast torpedo boats), and in remotely controlled battle stations. However, despite the proven solutions, field units kept sending suggestions for minor improvements. The suggestions were gathered, and based on them, a project revolving around improving its combat properties was started – the MG3 KWS project.
https://stateofguns.com/mg3-machine-gun-1586/