I notice a lot of people are saying that forged lowers are better because of
A. The grain being re-patterned due to the forging process, or
B. a lot of billet lowers are 6061.
But to my knowledge no one has adressed 7075 T-6 billet lowers like the POF ones. Given the high quality aluminum and thicker walls, are the POF ones stronger? Would it be more suitable to use a billet lower on a more powerful rifle like .50G or .308, etc? I also recall reading something about PSI ratings and that forged receivers can take up to around 80,000 but only 40,000 for the 6061 billet ones, does anyone have any specs on the 7075 ones? How much of an effect does the grain pattern have on strength? Is it something that can be overcome by thicker aluminum or is it a HUGE difference?
Also, another common response is "Well the lower receiver doesn't really take that much stress from firing." But what about *outside* stress like dropping the gun, getting run over by a truck, etc?
The POF guns look very rugged, but there are also other quality lowers out there like the Larue Stealth. Another point of interest is that billet lowers have more design freedom, like the POF's ambi controls. I like the extra features but don't want to give up durability for them. Also (bit off topic), what about billet uppers? And advantage/disadvantages there?
I am sort of a clutz and drop my guns a lot
and generally subject them to a lot of stress.
This is why I am asking to see if a quality billet lower will last longer than a forged one. Basically, I just want to figure out what the MOST rugged and durable AR build will be. OR maybe I should get a steel lower? Yes I know that a standard milspec AR is good enough but I'm looking for something better than "good enough" and already have a milspec AR.
Not trying to claim that one is better than the other, just trying to take all the variables into account. Can anyone shed any light on this situation?