Re: 762-SD vs. SCAR-H SD
The big difference is the Point of impact shift adjustability of the Scar H. Since it has 5 different starting points for threading it on, then each tightened position results in a different shift in point of impact. As a result, you can try all five positions and choose the one that results in the least shift in POI when going from un-suppressed to suppressed and back. On my SPR-M4 (same design, for .556) the best position on my AR is found when starting the threads at the #2 starting point, for example.
When I ordered a .30 cal suppressor, I called Polite Society and spoke with them about the various options - although I was planning on the SCAR H. One issue that was brought to light was that fact that the SCAR H has what they referred to as a relatively "leaky" mounting system, and that blowback between the can and mount required routine cleaning of the front lens on your optics - on a bolt gun. On an AR10 platform the handguard usually protected the scope from the grunge.
Anyway, based on what they told me, I went with the 762SD. It has the added benefit of the ability to run on a M4-1000 mount on a .556 platform, as well. Basically gives you at least two suppressors in one. It actually seems to be quieter to me (on a .556) than my SPR-M4. The POI shift with the can mounted was 3 inches straight up, so I just sighted in my .308 for suppressed use and haven't shot without the can since! I LOVE it. As for the POI shift, I mentioned it later while talking to Polite Society and they indicated that 3 inches was on the large side - most don't shift that much, apparently. Being straight down, it doesn't bother me at all. Who's shooting unsuppressed once you've got a can?!
The SCAR is quite an investment, but the POI adjustability is nice - just depends on how bad you want it. I am very glad I didn't spend the extra money, personally. Frankly, based on what I've learned with the 762SD, I wish I had bought the M4-1000 or M4-2000 and saved a little money over the SPR-M4!
EDIT TO ADD: Yes, as the poster below mentioned, the SCAR H will be quieter - mine is quiet enough for me, but the SCAR and SPR/M4 design is proven to be quieter.
Major Malfunction is supposed to be an excellent dealer, and I can personally recommend Polite Society. The majority of the time, it boils down to who has it in stock. Wait times for production to happen can be pretty extreme, so try to find a dealer that has what you want already.
