The best ive had - Phase 5 Weapon Systems Inc 90 Degree Ambi Safety Selector AR15/AR10

The review that says this doesn’t fit on an aero M4E1 is absolutely false, it fits and functions perfectly. The review that says it hits your trigger finger on the short side is also false, I can’t imagine the body mechanics this person must be using in order for that to interfere with his trigger finger, maybe it’s one of those stupid California featureless pieces of garbage, otherwise, I can’t see how your hand would be rotated even close to as much as it would be required in order for that to interfere with your trigger finger. This is very finally machined and has a great, tactile feel, and it is my go to for all my builds.