I have 3 atlas s ones on different rigs and really do like them, and the attachment method. I don't beat them up so can't comment on overall durability, but they sure are nice to time and install. Profile is great - assuming your gas block fits. I did have one gas block I had to return because it was a bit fat. That being said, my theory is "weight is a bit subjective". For example, I have a 3 gun rig that is pretty light - stretch 16 barrel with JP comp, Light Handguard, JP lightweight bcg, taccom buffer setup etc. Then another that is actually a full pound heavier with a pretty burly h