So I picked up an SAR-1 recently and am looking into having the barrel threaded. Unfortunately the correct 14x1LH won’t be possible due to the turned down diameter at the muzzle. That being said I’m looking into 1/2X28. The barrel OD is coming out to ~0.475 I know the 1/2X28 has a min diameter of 0.455. Will that be enough thread engagement or will the threads be too “shallow”