Rich has some questions:
Who are the good vendors?
I’ve owned ARs and parts from JT Distributing, Rock River Arms, DPMS, Delton, Stag, and many others. I find them comparable. I will note that Rock River parts seem to fit tighter. I tend to stick with JT Distributing because they make a quality product, use FN parts (like Colt), have good customer service, and I know Jesse.
.223 or 5.56? One works in both but one doesn’t. Are there advantages to either?
In 99% of the cases, either is fine. But a general rule of thumb is that it’s safe to fire a .223 in a 5.56 chamber. But a 5.56 in .223 may cause problems. Get 5.56
What tips and tricks do I need to know before I start?
There’s quite a few. Get all your parts and come to my house. We’ll hang out in the basement of mad science and I’ll walk you through the whole thing.
I’ve seen prices on stripped lowers from $89 to $200 and up. What’s up with that?
Used to be that there were only four machine shops that made most of the lowers in the country. So, it didn’t matter if you bought $200 lower or a $100 lower. I’ve used RRA, Bushmaster, Doublestar, and Essential Arms with no problem. I recently ordered two from SI Defense for $50 each. Note that I linked them up and apparently ar15.com did too so they ran out of stock and are backordered. I just got notification that my two will arrive at my FFL on 1/11.
I know that I have to go through an FFL to get the lower. Do I buy it first and then set up delivery or the other way around?
Buy it first, get confirmation, call up your local FFL and have them fax a copy of their FFL to the seller. I used Gunny’s, who charge a flat fee of $25 per transfer.
Get over there and help Rich answer his other questions.