The Nielsen piston in the Cobra M2 family of suppressors has been redesigned for increased strength and better performance while still allowing the user to adjust the point of impact. The baffle stack has been optimized as well and now comes apart from the tube to allow cleaning. YHM's Nielsen system allows the suppressor to function flawlessly on any semi-automatic handgun. Our Universal Piston design allows one suppressor to fit on almost any type of pistol. Cobra M2s utilize stainless steel components to minimize wear of the threads and the Nielsen device. The Nielsen device can still be disassembled for cleaning using the supplied tool. All Cobra M2 sound suppressors are constructed using Sound Tech’s patented baffle design (U.S. Patent #7,073,426) for superior sound reduction.