 The Rheinmetall MG 3, essentially an MG 42 modified to use the standard 7.62×51mm NATO round, and currently used by the German military, still uses a boosted short recoil design.Recoil boosters have found a use in suppressors on short-recoil operated semi-automatic pistols (i.e., most modern centerfire pistols chambered for 9mm and above).Such pistols have a barrel and slide assembly which recoils a short distance upon firing before the barrel is unlocked from the slide (usually by tilting the barrel in order to separate the interlocking lugs on the barrel and the slide).