The Postman just dropped off my Geissele SSA from Primary Arms. Ordered it Thursday morning. Those guys rock. Can't wait to install and give it a workout next weekend.
Put an SSA-E in my T....opened my laptop and pulled up the video of Mr. Geissele himself putting one in and just worked alongside of him. It was pretty darn easy that way.
Make sure you watch the video first. I installed one in my M&P 15 about 2 years ago. Amazing how my groups tightened up first time out....best money I ever spent on my AR.