FX Wildcat - What Moderator choices do I have

I don't have a MK3 but today I picked up a Huggett Atom its only 3.5 inches long and I think it was 1.22 diameter. It was only a hundred bucks. At my house and on my gun it was quieter than my Odb 110 that is almost a inch longer. I wanted to try this shorty for awhile. I was able to drive up Penchetta and pick it up and have only shot about 30 pellets through it. I am pleased with it. At 40 yards my zero and grouping didn't change at all. Iink bellow. 



http://penchetta.com/huggett-atom-ldc-moderator-177-22/




 
I don't have a MK3 but today I picked up a Huggett Atom its only 3.5 inches long and I think it was 1.22 diameter. It was only a hundred bucks. At my house and on my gun it was quieter than my Odb 110 that is almost a inch longer. I wanted to try this shorty for awhile. I was able to drive up Penchetta and pick it up and have only shot about 30 pellets through it. I am pleased with it. At 40 yards my zero and grouping didn't change at all. Iink bellow. 



http://penchetta.com/huggett-atom-ldc-moderator-177-22/


What caliber is yours? Will it work on the larger calibers? They have a .25 in stock but I want to make sure it would handle more than 12 ftlbs.