Had some issues with these - Radical Firearms A2 Flash Hider

I've gotten probably six or seven total of these. Two of them that came the threads were cut too shallow like their cutting teeth had been wore down. After trying to force it couldn't get it on without risking damage to my barrel threads. Surprised there isn't other reviews on here similar but that was recently so maybe there will be. And yes, I have done a lot of them and have a threader so it's not dumb user error. Three stars cause they are CHEAP and most of them have came just fine and exactly the same as some that are four times the cost.