Some are more expensive to make than other, aluminum vs. stainless, closed construction vs. suppressors that can be taken apart. But a suppressors is nothing more than a small car muffler bolted onto a firearm.

Sure some have undergone a lot of testing in order to alter the sound signature, but that is of more relevance to special forces rather than hunters and civilians, and probably no benefit to regularly military forces ***

Others apparently do some fancy things with the gas as it exists the muzzle, but I don’t think this would apply to low powered rifles.

As far as construction goes, I will be writing a big post on how suppressors work, and how they are constructed.

*** I have heard of these suppressors that alter the sound signature so a gun shot sounds like something else, such as a car door slamming, but have not come across one myself.