He was talking about forged lowers, of which most all of the forged lowers made are made from a couple of different forgings/forging companies. Kinda like car batteries, there's only about 5 actual manufacturers in the country that make car batteries (outside of exotics like Optima, etc and for this discussion, consider them like the billet lower mfg's) but there's hundreds of different "brand names". These few mfg's either sell 80% or raw forgings to vendors that finish them out, or they finish them on site to customer spec and roll mark with customer's info.
Info from an Arfcom post that explains some of it here's a link
http://www.ar15.com/forums/t_3_12/31...mpared___.html
Now Billet receivers is a whole other ball game and all the info goes out the window as to weather or not they're using someone else's CAD files, or their own, or if they are starting with solid blocks vs partially finished billets, etc. Only they can tell you that. But honestly if you've got all the CNC equipment, there's no reason to start with someone else's partially machined units.
Originally Posted by XC700116
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