@308mate I've had the chance to fondle a couple of Manniatis cans and take a look at the gubbings.
It's a pretty conventional design with a couple of twists. I don't believe they can be taken apart once assembled. There's a big flat internal muzzle break to send gas back into the isolator tube. Then going forward there's a couple of baffles just like you'd expect. Where it differs is the brake and baffles are all machined out of one piece of 7075 though and placed inside of a nice carbon wrapped tube. The brake and baffles don't have a lot of meat to them and small amount of material used leaves it very much hollow with lots of volume for gas relative to the size.
I expect therefore they are as quiet as is claimed and the Rod & Rifle test is probably so out of date that it's meaningless now. Ultimately I decided against a Manniatis suppressor for myself though because 7075, no matter how you coat it, anodize it, whatever... isn't going to last nearly as long as SS or Ti and I was happy to accept a bit more weight for extra longevity/high volume shooting. I got something a bit more heavy duty.
They'd be great for rifles that don't have much muzzle blast. 223's, 300 blackouts etc. and for alpine rifles which aren't doing huge numbers of rounds. Anything you would happily run a DPT on without a SS baffle, I'd happily run a Manniatis suppressor on.
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