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the trouble with supers is the same as with centrefire...you can trap all the exhaust type gases as subsequent explosion noise but you cant get rid of the supersonic crack caused by projectile going...

mine improoved no end once I took the spare thread protector OUT of it...they in there for storage when shipped and I never twigged as rifle it came with already had one on,it wasnt till I read...

Ive put my .223 spartan suppressor on the .22lr for grins and giggles,cant say it quieter than normal manders one but it sure wasnt louder.