Pakistani Ordinance Factories has designed a new rifle that looks to the HK G3 for inspiration. It's a new, propreitary design, though it uses some HK G3 components to speed up production, is intended to be more modern and modular, but is still roller delayed blowback, like the G3. Basically, it's sort of like something HK might have designed if they stuck with the roller delayed system outside of the MP5.
The roller-delayed blowback action seems to have faded into obscurity. Until now. Meet BW20, the new battle rifle designed by Pakistan Ordnance Factories.