Avengers CNC Aluminum Free Float Rail System for M4 Series Airsoft AEG Rifles (Length: 10")

"Installing this rail system was the most frustrating thing I've ever done. It literally took me three hours of blood, sweat, and tears to put this thing on.... and its still not straight. However, I cannot complain because of the price. I don't believe that there is a cheaper RIS on the market as of right now.

Pros:
Cheap
Looks good

Cons:
Hard to install
Didn't come with instructions
Doesn't fit on the gun straight (Might with a lot more time and work)

Overall, it wasn't a bad purchase. It still works, and it is pretty solid.