Greetings everyone.  I have a question.  Several years ago, I bought a Carbine length gas psiton impingement gun from Adam Arms.  I have decided that I would like a longer rail across the top so my iron sights and optics aren't so crowded.  I know certain companies like Midwestern Tech make a carbine length rail that is extended across the top, but these do not fit gas piston systems (according to both AA and midwestern websites).  Does anyone know of a handrail system that extends the top rail that will fit gas piston systems?  Otherwise, It'll cost about $500 or so for a new gas rod, mid barrel, and mid-length rail for my AA. Thank you.

I am not quite sure I understand what you are asking. I was not aware that AA made DGI firearms. Do you know what rail system is currently on the rifle? I know AA uses Samson Evolution rails. I suggest you start looking there for replacement rails.

Sorry, let me clarify. I meant gas piston. I looked at Samson they don't make what I am talking about. Here is the product I am looking for, but this one doesn't fit piston systems.

https://www.midwestindustriesinc.com/product-p/mctar-20xg2-blk.htm