IMO DPT cans are not good for gas back, even with an adjustable gas block.
This is my experience on a number of ARs, different barrel lengths, calibres and with and without adjustable blocks.
Gas busting the charging handle helps.
I wouldn't buy another for use on a direct impingement AR.
If you can, get the Superlative Arms bleed off block. It can bleed off or pinch the gas system to suit the user.
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