There is a thread over at AR15.com that has some video, a parts list, and some rough instructions for building a suppressor:
http://www.ar15.com/forums/t_1_5/1693688_The__100__308_Suppressor__That_is_as_good_as_an__800_one_____New_Video_12_10_in_OP.html

Okay, so not exactly $100 (since you’d need the $200 NFA stamp), but the parts can be had for that amount. But for $300, being able to construct your own suppressor doesn’t sound too bad. If it is functional, it would sure beat dropping $1k+.

This almost makes me want to submit a Form 1 and give it a try. I would like to see a video of the construction, or maybe some assembly plans, but it seems pretty straightforward. I’d also like to see a comparative test against a commercial suppressor and this one with a decibel meter involved.

Has anyone here gone through the process and created a suppressor? Does this seem like a reasonable and possible project?

Thanks to Jay D for the find.