UPDATE - 8/4/2010
A few months ago I tried to start up a group buy for these 11% HK416 clone lowers, but there simply wasn't enough interest to meet the 20 minimum order. Now that I'm married I have a little breathing room so I have more time to put towards this project. So what I'm going to do this time is just go ahead and produce 20 lowers on my own and HOPE they sell once they are finished. If you are interested in one of these 20 lowers, please contact me ASAP to reserve your spot in line. You can email me at firstname.lastname@example.org
I'm planning on starting production of these lowers in about 2 weeks (once the material arrives) and I should have them finished in about 6 weeks or so from the start date. I will be sending these off to be broached so that might add another couple weeks depending on their work load. Below I've attached a pic to show how much machining will be done. The price shipped to your door will be $380 You do not need an FFL to buy one of these because they are considered a non-firearm.
You can finish the 11% lower with my drilling jig and milling adapter kit. All of the "hard machining" will be complete. The lowers will be machined from 6061-T651 billet aluminum. This is the same grade of material we use every day in the aerospace industry. I've looked into machining the lowers from 7075, but the material cost is so much more expensive. If guys are making functional lowers from plastic, then you don't have to worry about the little bit of difference between 6061 and 7075. The lower receiver of an AR is a low stress part. No engraving will be included with these lowers. I can supply you the engraving data if you choose to have it done on your own. I chose not to include the engraving because I didn't want to infringe on HK's trademarks on something I'm selling. Email me if you are interested in sending payment and getting your name on the list. If you have any questions, post your question here and I will respond.