The Mk2 definitely needs a moderator as it has quite a muzzle blast. I have the Huggett full length one on mine and it barely makes a noise, it’s the Wildcat specific one as it has a 20mm thread on the end of the shroud. Mine is a .22 and it’s a fantastic rifle, light and very accurate. I’ve bought the Fx replacement Picatinny rail for mine and swap between a Viper Connect for my hide shoots and a Yukon Photon for night shooting