Bill T put me on to Bill Springfield who does custom trigger work. He has worked on Bill's AR and both my AR-10 and 15. He charges around 40 bucks postage included, his work is sensational and turnaround time is a week or less. Here is his web site. Regards, Rick.
http://www.triggerwork.net/ar15.html
Rifle scope or dot sight, which one is more suitable for AR15? I use the AR15 for hunting elk and turkey. I've read this article about AR15. But I still have some questions. https://www.cvlife.com/blogs/news/red-dot-sights-vs-rifle-scope-what-s-the-best-for-ar-16 (https://www.cvlife.com/blogs/news/red-dot-sights-vs-rifle-scope-what-s-the-best-for-ar-16)