I'm looking to buy an AR-15 lower assembly and I know next to diddly-squat about the AR market when it comes to buying. So far I've gathered its cheaper to buy an assembly than build one from parts, given the tool cost and what-not (at the moemnt at least). I have a chance to get a reciever group (stock, 1 magazine, and complete assembly) for $375. Its got magpul goodies on it, so the MOE stock I like and is SUPPOSEDLY milled. Is this a good deal? And just a curious side note, do forged recievers have the possibility of having air-pockets in them like I've been hearing from "the rumor factory" aka other gun-store patrons and interwebz?