I didn't even know these existed until I saw another member selling them in the classified section. Without hesitation, I bought the lot of them (4). They're listed and made by pcp-shop.ru - and a lot of thought was obviously put into them! They don't seem to add any weight, whatsoever.
All that I can say is WOW! These have made a substantial difference in quieting down my Leshiy. I'm currently using one of the longer ones for .22 with my 350mm barrel. My Huma is cranked up for 930 - 960, and the only backyard unfriendly sound aspect of this setup is the pellet strike. When I turn the HST down below 820fps - it's virtually inaudible.
The screw on extensions are well made. They're all one piece with ports drilled on the side and the muzzle end. The inserts are clearly 3D printed, but I'm not sure if that's all to them - there might be some extra manufacturing magic happening behind the scenes.
Here's some photos of the setup with the extensions. They're also pretty quiet without any extensions, when I tested the short configuration with my 250mm .22 barrel...
All that I can say is WOW! These have made a substantial difference in quieting down my Leshiy. I'm currently using one of the longer ones for .22 with my 350mm barrel. My Huma is cranked up for 930 - 960, and the only backyard unfriendly sound aspect of this setup is the pellet strike. When I turn the HST down below 820fps - it's virtually inaudible.
The screw on extensions are well made. They're all one piece with ports drilled on the side and the muzzle end. The inserts are clearly 3D printed, but I'm not sure if that's all to them - there might be some extra manufacturing magic happening behind the scenes.
Here's some photos of the setup with the extensions. They're also pretty quiet without any extensions, when I tested the short configuration with my 250mm .22 barrel...
