Jaron, I disagree.... Running 556 ammo through the Specwar762 is actually quieter than the Specwar556. I assume because of "volume" of the muffler.
See here:
https://www.youtube.com/watch?v=ojo5sjkXWPk
Also, I hate to sound too contesting... But, I'd like to know where you heard what you heard about accuracy being affected (gasses lingering, etc). It is my opinion that a suppressor will absolutely affect point-of-impact (where the bullet hits the target). BUT, I do not believe it will affect the group size down range.
Ryan, stop by the house and feel a can on a 16 inch barrel. you will be turned off instantly. it feels like you are wielding a telephone pole.
The Specwar 762 is enormous and more expensive than the Specwar 556. So it seems like the Specwar 556 would be a good choice. The Specwar 556 can be had on sale at BWSC from time to time from 400-500. A saker is also a great option. the design is SUPER cool and seems to be beneficial if you have a "blowout" or failure.
I always recommend buying a larger bore can than you need if you have both applications (a 556 gun and a 762 gun). the Specwar 762 does great on an SBR. Cant hardly notice the 2 inch length difference. But on a 16 inch barrel it's just not ideal.
If money was no object we'd all be running Surefire's.... But since money is a factor to most of us... buy the specwar.