Not true at all. Yes, compared to a titanium baffle they are heavier. Outside of that, formed, clipped, stainless freeze plugs can work very well and will stand up to anything. My formed freeze plug cans work just as well, maybe even better, than a Silencer Co Omega. They don't leave you wanting for anything. My longest cans are 8" and weigh 14oz. Not the lightest in the world but a Dead Air Sandman weighs 20oz, so not bad either. Formed freeze plugs also cost $40/10. Whereas a single machined titanium baffle costs $30-40. You need 8-10 baffles for decent suppression. If you plan on building more than 1 can then it adds up fast…and once you build one you'll want to build more.