the Magpul PMags are very good, and very popular. there seems to be some problems with the 20 rd mags, but the 30 rd mags seem fine. i have NO experience with the 20rd PMags.

the anti tilt followers are a good idea. there have been several revisions, so a little research will help in finding the ones to avoid.

also, the metal usgi mags are good as well. D&H, is one brand that is well received.

as far as scopes go, lots of schools of thought. the best gets expensive, and if your life depends on it, you should get the best.

otherwise, there are a lot of options

http://www.at3tactical.com/blogs/news/11491881-ar-scopes-what-is-the-best-scope-for-your-ar-15

as for verticle grips, i don't like them personally. i have a friend who is a Green Beret, and he uses this:

https://www.magpul.com/products/afg-2

keith

if a man speaks, and there isn't a woman around to hear him, is he still wrong?