Without having to search, which I am inept at anyway, can someone tell which of the .223 supressors are rated for a 7.5" upper. I know most are 10.5", as is my G5, but my boss really wants one for his 7.5". A QD is preferable.
In general any good stainless steel can could, but check with the manufacturer to be sure.
Here's one that's specifically rated for that; http://thunderbeastarms.com/products/223a
I have a American MFG Triple X and it will hold up to a TON of abuse, however the gas tube on a 7.5" will melt if a 30 mag dump is done out of one. Yes I did do it. It will also blow a hole in the gas tube if a 100 Beta is dumped out of one @ about 80-85rds without a can on it.