I have mostly Tripp, McCormick and Ed Brown mags. Some 7rounders, 8 Rounders and 10 rounders. My 1911A1 eats from them all with no problems. I only CC have 2 Colt factory mags that came with the gun and they work too.
I like PEPR mounts. I am very much the amateur when it comes to AR’s though
https://www.brownells.com/optics-mounting/rings-mounts-amp-bases/mount-sets/ar-pepr-permanent-mounts-prod42009.aspx