A huge improvement over the stock selector. - Magpul Industries SL Grip Modules & HK Polymer Trigger Housings

I got this for my Century AP5M. The stock selector it came with was incredibly stiff and a bit slippery, which made it hard to actuate from safe to fire. Not only is this selector much smoother when switching between modes, it's also got good texture to it which makes it very easy to get your finger on. The ability to switch from single sided selector to ambidextrous being included is also a huge plus. I highly recommend!