Re: 308 suppressor
Another vote for the 30P-1. Great suppression, little to no POI shift, very light weight, very well made.
If you are looking to get into a decent suppressor for as little as possible, the YHM Phantom 7.62 is actually a pretty good can. It is heavy as balls and has a definite POI shift (though it is very consistent), but suppression is good, recoil reduction is good, and it is quite sturdy.
I own both, I use both, I prefer the 30P by a significant margin, but the YHM works just fine for a really great price.