Nielsen Device: How it Works and Why it's Necessary
This guide details the installation and function of a Nielsen device, also known as a recoil booster, essential for reliable semi-automatic pistol operation with a suppressor. Expert Ian McCollum explains its necessity for recoil-operated systems, contrasting them with fixed-barrel designs. The device uses a spring-loaded piston to decouple suppressor mass, allowing proper barrel tilt and cycling, as demonstrated with examples like the Lionheart Vulcan 9 and Glock pistols.












