CMMG's Mk9 pistol-caliber platform is the latest design in the company's lineup to incorporate the Radial Delayed Blowback system. These Mk9 platforms are available in Banshee and Resolute options.

But H&K designers delayed or retarded the gun’s blowback action with a gas system. The PSP’s barrel is ported just forward of the case mouth seat in the bottom of the fluted chamber.

The next wave in concealable nine-millimeter submachine guns was the H&K MP5, which featured a roller-delayed blowback system for smooth recoil and a highly modular design.

Radial Delayed Blowback also reduces bolt velocity, ... U.S. Pat. No. 9952011) in order to allow the Last-Round Bolt Hold Open feature to be compatible with the 10mm and other pistol cartridges.

CMMG recently unveiled a new line of super-compact AR15 style pistols and short-barreled rifles chambered in FN 5.7x28mm. ... we were excited to pair the 5.7 with our Radial Delayed Blowback system.

Simple or straight blowback proved to be so reliable that was employed in such firearms as the Thompson submachine gun, MP40, Sten Gun, Uzi, and Skorpion vz. 61. Delayed Blowback ...

Ditching the handgun cartridge and running more powerful rifle ammunition called for an updated operating system. The MP5's roller lock, delayed blowback system is fine for pistol caliber loads ...

The CMMG MkG Guard is an AR15-style rifle for chambered in .45 ACP and features a Radial Delayed Blowback operating system that works to harness the strong recoil impulse of .45 ACP.