Originally Posted by armed1212
wat do u think about an ATI ar15 complete omni poly lower w/stock n parts kit. for $129.00????
That's not a bad deal. But my guess is you'll want to at least upgrade the crummy stock (my advice would be Magpul MOE...stay light, and keep it cheap). Still not a bad deal even with the extra cost of a stock.
I'd rather spend $300-400 setting up an aluminum lower build of my liking. That's just what I prefer. It might not be your preference. I've got some polymer lowers-- they can be built into ultralight guns, and generally, I believe their ultimate quality is sound. But when I build on a poly lower, I build it to sell. Personal preference. My keepers are metal.
My advice: If the poly lower doesn't deter you, go for it. You can build a light rifle at a nice price, and still pour solid money into the upper (where your $ really count). Some folks will tell you these lowers are destined to fail. While I don't claim to be an expert, I tend to disagree. Lower receivers don't endure much stress. The most stressed point would seem to be the buffer tube threading...and that's going to boil down to the density of the threads, tightness of fit, and (most significantly) the molecular composition of the polymer...and to be honest, that's beyond my expertise.
I think you could build a pretty cool featherweight $700-1000 rifle around a poly lower. Anything more than that ($), and I'd really recommend going with an aluminum lower from a respected maker.