Good gas block 1 flaw - Kaw Valley Precision AR-15 Adjustable Gas Block

Buy a spring punch and hit the threads a few times in multiple places or angle a chisel and lightly mar the the threads leaving first few rows intact, no retention is its only flaw, the screw for the gas tube is epic, machining is great, all gas blocks leak until carbon fills the cracks dont let them reviews say otherwise ive spent $2000 years ago on best of everything guns that they leaked its the nature of tolerances cant make it that toght for every barrel