Already have the Gemtech for my H&K .45 ....but couldn't get a barrel at the time. I decided several years back to get supression for my 9mm, .45 and .223 ......you never know when you won't be able to buy. I went with the trinity system for my 9mm, so I could use it on a rifle as well. They are very quiet and practical for a long noisy day of shooting.
Rick
Rick