
Originally Posted by
Heavy Metal
I wonder how well the lower would take a lateral stress to the buffer tube like somebody using the rifle for a step-up?
That is the critical area IMO. The reciever ring where the buffer tube mounts. They are limited here because they cannot simply add material due to charging handle clearance.
Cav Arms got around this by integrating the buttstock.
If you go to YouTube and find their video's, in the third one they have two guys hold either end of it holding it horizontal to the ground and a third guy uses it as a step to get into a pickup truck. It held and fired immediately after.
No one is saying it can't be made of polymer. They are saying you can't take a part designed around one material and switch it with another. You would have to design said part with polymer or any other material at that from the beginning. Meaning it would be different specs, reinforced in different areas etc. Point is the lower being made with just another material and not designing and testing where it might fail with that material is the wrong answer. You can't say ohh this weapon uses this material and it works just fine, that is because they DESIGNED IT to be made with that material so it would work.
Except that really doesn't hold true. You can always replace one material with another if it's equally as strong/tough/durable/equal in value. You could take an AR lower and build it out of steel or titanium couldn't you? That's replacing one material for another isnt' it? It would work wouldn't it?
You're just assuming that because something is plastic that it can't be strong, but that's just not true anymore.
Police work: If it were easy it would be called your mom.
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