I have an AR that is the gun I keep with me on the place that I manage. 20 round mags so they don't get in the way and suppressed. I keep adding stuff to it to make it better and I am not mechanically apt. I put an SLR adjustable gas block on it, tuned it per directions, and it is now so soft in recoil that I can see the bullet hit the target (or miss). If you shoot them suppressed a correctly tuned gas block will keep your brass clean compared to fully gassed. Amazing that a gun that I built on a shop table under the barn shoots like it does and be so much fun.