Dissapointment - NEMO Arms Recoil Reduction Bolt Carrier Group and Buffer Kit - Large Frame

I used this while putting two builds together. One budget friendly (stag10 overstock sale rx set, larue tactical barrel, and ballistic advantage nib bcg, geissele rifle length super42 buffer spring and standard carbine length 3.5oz buffer in a bcm a5 buffer tube, +small parts and furniture. Came in just under $800) for my brother. And my nemo arms build ( nemo xo10 rx set, 16" nemo barrel, and this buffer/ bcg set. $3500). Both guns spec basically the same except the nemo buffer kit and my go to buffer and spring set up. I was much more impressed by my brothers build, recoil, reliability, weight, and speed were all better on the $800 gun. Recently converted my nemo build to my goto buffer system with a lantac bcg and now it feels like a $3500 ar10. This kit also showed up missing the ejector assembly. Nemo did respond immediately and overnight the parts. I love nemo, i don't care for this system in the 308. I've shot a nemo odim 300wm with this system and it's great. That's where it belongs and was developed for.