Best safety upgrade you can do. - Battle Arms Development Short Throw Ambidextrous Firearm Safety Selector for AR15 / AR10

This short throw is a great upgrade. It is a positive click throw. For anyone with smaller hands the shorter throw makes the rifle easy to engage. Has to grind off the safety nub if you are not using a short throw lower, but it is 10 seconds with a dermal. Totally worth the money.