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Hi Lonnie and welcome. Yes, the thread pitch for the muzzle of a Polish Hellpup AK-47 pistol is 14x1LH (14 millimeters in diameter) and this 14x1LH tpi muzzle brake will thread on directly. Just use a touch of blue loc-tite to keep from loosening when firing. Cheers, stay safe and enjoy!

Yes this will fit the polish hellpup. M14x1 LH

Hi Lonnie, yes sir, this will fit the Polish Hellpup. Muzzle brakes properly installed and torqued should not need any thread Lockers. Loc-tite can sometimes cause gaulding and once this happens you will never be able to remove the brake again. Stay safe & have a great day!