Okay, let's see if @98Z5Vhas taught me anything. Not his fault if he didn't, God knows he's done his best.
So, on an AR-15 (which does have specifications), the standard buffer weight is wrong (Really? Since when). The rifles are overgassed, at least on the .308s (Oh, so that's why so many people have to drill out the gas ports. It's to let all that extra gas out!) and they can cure this for only around $45 extra over normal cost. What's not to like? Or did I miss the point entirely? (wouldn't be the first time). So, if it happens that I'm right, shouldn't they rename that thing an AR-Son-of-a-...?
Check me on this, @98Z5V. Am I just confused?