That is my point exactly , they don't make drop in or ready to shoot barrels for AR 15s . The sites you provided actually shows that they only furnish blanks and don't offer any advice on how to seal gas tubes or blocks. AR Performance has his own chamber which is to the 6.8spc and 6.8spc2 what the . 223 w is to the . 223 and 5.56 . I advised op get a 6.8 if gun was going to be a hunting gun and anyone who knows anything about 6.8s would not considered Hs barrels " no name " they are the ones others copy . His 3r and 5r performance barrels often out perform barrels people pay twice as much for . And his are ready to shoot , you don't just get a blank someone has to machine .
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Congrats?
I suppose you believe White Oak and Compass Lake don’t know what they are doing as well...