Ambi-Magazine Catch AR15Compatible with all AR15 M16 rifles Installs the same as factory mag catch Works with original (and aftermarket) mag release button Forever the AR15 has been a right handed persona**s tool. With Ambi controls evolving, ita**s becoming more of a tool that everyone can use, even left handed shooters! This Ambi Mag Catch works in place of a standard mag catch to allow left handed shooters to drop their mag without having to switch to your right hand for