My guess is mass, since you'd need to make the polymer thicker than you would with aluminum in order to make sure that those bits don't break. However since the KP15 is Phagan's baby the reasoning is probably way more autistic and pedantic.
Oh hey what do you know?
why did the very early Cav Arms lowers have the Plum Crazy vertical detente? either that was some weird one-off or the two that i acquired after the 2001 show in Vegas were pre-production. the vertical hole was definitely a bad idea though. later from RSR, i received shipments (2008?) of receivers with ball detente take down pins, so as far as i know those were the last ones available. i was told there was an aluminum reinforcement at the rear due to cracking through the rear takedown pin hole, however i never cut apart a receiver to check. i do know that a couple other manufacturers at the time were doing something similar with brass reinforcement especially because the threading of the area for a collapsing stock was prone to failure.
then i've confused you for the other guy Karl has been featuring now and again. feel free to ignore that portion and my apologies for that confusion.
Are you thinking of Deviant Ollam?
probably. i don't keep track of people i don't deal with personally, so i'm pretty sure i just confused him for someone else that spergs out online. they all blend together at one point or another and his hostile "It's been fun reading your conspiracy theories, gossip, and grown up telephone game rumors." is both unprofessional and unexpected in someone directly involved that deals with the public regularly during the course of business, regardless of the forum for the interaction.
Remember the whole "Phagan is Comic Book Guy from The Simpsons" thing? This is exactly what we were talking about, he's always like this.
Since we are here, I'd like to know what is the point in developing and producing the KP-15. I don't mean it dismissively, either: there have been quite a few foibles, a fairly long development process, and I can't imagine any of this has been cheap. This is also the third (fourth?) attempt at the concept, if I got my CAV Arms history right. So, I'm genuinely curious as to what makes all the development and manufacture work worthwhile, compared to producing a conventional lower.
No offense but until you reach out to a mod and prove you are SR I'm just going to assume you're some random weirdo. Don't take it personally but this is KF and people regularly show up here claiming to be people or to have insider information and it often turns out to be bullshit.
It is my belief that @Null is the one who handles verification requests, and will assign you the POI-tag, provided you confirm your identity. I do not think you are deserving of the lolcow-tag quite yet.
Please do. Make sure to mention the forum and it's owner, Judas Moon, if you decide to upload such.
I take it that this device is not legal in California then again what is legal there anymore. It will soon be the most individualistic state with every man for himself for anyone left there at the rate everything is getting the ban hammer.
the KP-15 is a centerfire, semiautomatic, detachable magazine-fed rifle and could be made California compliant with some minor effort, either with a blind magazine well, or a completely "featureless" design which would require modifying the lower to delete the pistol grip and have a replacement of some kind in it's place. other "features" like a barrel shroud or flash hider would also need to be removed. more recently, a vertical grip (or forward pistol grip as amended in PC) is also counted as a feature. a centerfire, semiautomatic rifle that has a detachable magazine must not have any other feature as listed.
Ares used to make something called the SCR lower which was effectively a traditional monte carlo style stock for a featureless AR upper. It looked like the bastard love child of an AR15 and a Mini14, you could probably do that in full polymer and they'd most likely sell like gangbusters.
the problem would be the articulated carrier which would put an awful lot of stress at the wrist of the stock, not to mention the issue of the ownership of the design and how permissible it would be to use a "polymer version" of it. that isn't even going into the costs of tooling up for a design that barely uses anything from what you already have tools for.