How about auto bolt carriers for all the other calibers? main interest would be in 6.8, .22, 9mm (how do mags fit in .223 reciever?) and maybe 7.62x39..
Already long ago, from when we sold our vote to no man,the People have abdicated our duties; for the People who once upon a timehanded out military command, high civil office, legions — everything, now
restrains itself and anxiously hopes for just two things:bread and circuses (Juvenal, Satire 10.77–81)