I bought my 2nd lower receiver last week and thought it would be helpful to start a thread about ARs and building them here. Here's my current AR15 collection:
All of the components were purchased at gun shows with the exception of the CCMG lower receiver I purchased last week. I built the Olypmic Arms lower (bottom) about 15 years ago. Long enough that the upper I built with it (2nd from the top) had set screws holding the flash suppressor on. That has since been machined and had a threaded flash suppressor installed in the wake of the brady bill expiration.
The Next step is building a new lower this year. The first lower I built was bone stock. This one is going to have a better trigger and stock. I've already identified the lower kit I'm getting: