PSA Rock in 5.7x28 using a 5.56 silencer without a booster.
This video showcases the Palmetto State Armory (PSA) Rock pistol firing the 5.7x28mm cartridge. A key aspect of the demonstration is the use of a 5.56mm silencer (specifically a Griffin Armament Optimus Micro) without a booster or Nielsen device. This setup is unusual and highlights potential testing of suppressor performance on a pistol caliber, especially with a larger rifle caliber suppressor, and the implications of running it without the typical booster mechanism designed to aid cycling.









