Of late I given a lot of thought into building an AR-15, so I thought I would post here to get some feedback and opinions.

First off I live in California, so the only real option for purchasing a finished rifle is that awful Bushmaster thing so that's not an option.  So my plan was to buy a Stag arms stripped lower and a lower parts kit and assemble that.  Then I need to ether use something akin to a Monsterman Grip, which looks ridiculously uncomfortable but I've never used one so who am I to say, so that I can use detachable magazines.  Then there's option B I could use a bullet button device, you have to use a bullet or some other small tipped item to release the magazine so that it can be classified as a fixed magazine weapon, which would mean I could use pistol grips, telescoping stocks, forward pistol grips, and flash hiders.

The next question I have is should I just buy a complete Stag arms upper or does it make more sense to build one from a stripped receiver?

I appreciate all thoughts, insight, and opinions.

I thought about the U-15 stock, which does look markedly more comfortable to use than a Monsterman grip but than again it also comes with a markedly higher price tag.  A price tag I'm not quite comfortable with ATM.

Thanks for your input though.