You have a timing issue. TR's suggestion for the 2xH buffer is a good place to start. You can also check out bolt carrier weights. There are a number of other drop-in aftermarket solutions, all of them intended to add weight/inertia to the reciprocating parts and delay unlocking. Gas system tweaks are more involved. I've used the pigtail; they work but will interfere with some handguards. My personal solution is a mid-length gas system (which doesn't help you with an SBR  ). Get the Brownells AR specialty catalog for a convenient reference. HTH
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A nation can survive its fools, and even the ambitious. But it cannot survive treason from within. An enemy at the gates is less formidable, for he is known and carries his banner openly. But the traitor moves amongst those within the gate freely, his sly whispers rustling through all the alleys, heard in the very halls of government itself. For the traitor appears not a traitor; he speaks in accents familiar to his victims, and he wears their face and their arguments, he appeals to the baseness that lies deep in the hearts of all men. He rots the soul of a nation, he works secretly and unknown in the night to undermine the pillars of the city, he infects the body politic so that it can no longer resist. A murderer is less to fear.
~ Marcus Tullius Cicero (42B.C)
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