what parts of an ar-15 need lubricated: Very good question.
steyr aug ar-15 conversion: Offhand, I do know that you have to replace the stock as part of the conversion to accept AR-15 magazines.
ak 47 automatic conversion guide: NO.
ps90 conversion to automatic: This search came up on the same day as the previous one. How did all the idiots find TGW at the same time?
how many 223 rounds can i get out a pound of powder: It really depends on the powder and how much you use. But with most powders, it'll run somewhere between 275-400. Tip: Divide 7000 by the number of grains in your load, and you have how many rounds you can get out of a pound assuming you don't spill/lose any. If you want to save money, you have to look at both the amount of powder you get for a dollar AND how much powder gets used per charge, to compute the total powder cost per round. That having been said, IMR4198 is generally a good powder for economy.
conversion for a par 1 centerfire pump: Gah, it seems half the internet thinks that this is some legal way to have a detachable-mag pistol-gripped semi-auto centerfire AK in California. It is not! Read LegalCalifornia and ponder SB23! I literally get SIX different people searching for this per day on some days! Heck, if you intend to build a CA-illegal AK, just buy one that's already semi-automatic and reattach the pistol grip. Less hassle.
pressure propelling a rifle bullet: This varies by caliber and load, as well as rifle barrel length.
california law folding stock welded: In California, there is no standard of permanence attached to rifle stocks. Depending on the style of stock, it's possible to lock a stock open using washers in the mechanism, or set screws. There is no reason one must weld a stock in California, other than dealer paranoia. If your dealer insists that your rifle be permanently disfigured before he'll transfer it to you, then find a new dealer.
in california is a garand enbloc considered a magazine: Negative. In fact, part of the commentary from the Department of Justice about the implementation of the SB23 assault weapon ban specifically stated that an en bloc clip was not considered a magazine.
atom ar15 receivers: You may be thinking of a Mega Machine Shop lower. The logo on those is a picture of an atom.