Originally Posted by
rob_s
One question here is how often are you planning on shooting suppressed:non-suppressed? In percentages of # of rounds fired, 100:0? 50:50? 25:75?
That will determine how important materials and durability are for you. From there, you need to prioritize other criteria like length, weight, mounting system, and cost. It's hard to offer any advice without knowing how those things factor in for you. I don't see how you can exclude those criteria.
Absent that information, I'd think that if you bought a 7.75" upper then length and weight are important to you. I'd be looking for something in the <1 lbs and ~7" range, if not even shorter and lighter.