I've tried this method and it didn't work for me. I had one of those jobs where you could vent excess gas overboard. Never could get a good setting. Just made a big mess! And this is one thing they don't mention. With an adjustable gas block, this is another point of inspection that must be cleaned of carbon periodically. With a rail over it, no easy task. So no thanks.
The biggest change that really worked was a SF OBC. When you optimize the BC for a short-barreled, suppressed weapon, life is good. The cam slot has a revised dwell time, and the carrier tail has it's own additional counter-weight. So in conjunction with a custom buffer and spring, you have a complete system that can handle the different pressures and so forth with this config. That's if we're talking about a 10.3", .070", carbine extension-length, suppressed weapon. And maybe mil-spec ammo and P-mags.
Working for Crossfire Australia, a military rucksack and load-bearing equipment company. Still doing limited design and development of nylon LBE.
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