It’s a damn cool idea that I’ve been keeping tabs on since first announced on SilencerTalk. Basically a switchblock in the upper itself. One of those “why didn’t we think of that?” moments for a lot of folks.
I know Philip from IA and have quite a few of his products (suppressors). He showed me the prototype back in August and at that time he had several thousand rounds through the upper with no problems. Philip makes quality gear.