I got this awhile ago for my GG M14. This rail is meant for only GG and CA. I got it because it is cheaper and has an extra rail, though not in the most useful place... I can mount a red do there but it is awkward to use, and I have not tested this but a Laser might not work because you would be in the way... Either way this is a better buy than the GG one, its $5 cheaper and has an extra rail... my only complaint is it fits the GG great but its not perfect its (by milimeters) off to one side or the other and often slightly (very slightly) crooked (by a degree on two). It just takes a keen eye and a little time but by being OCD with the grub screw i got it to line up perfectly... (but one spacer/washer thing between the RAS ans Gun to do it well.
extra rail, though not very useful
mounts your scope/red dot...
very solid platform
can still use iron sights, and its sweet to aim with this on and iron sights... it just looks cool looking down the rails... thats probably just me
cheaper cost* than the GG
OH the grub screw is reall small and i used a safety pin to turn it :D
Overall: GET THIS ITS A GOOD BUY!
Rating: [5 of 5 Stars!]