People who said it looks like an ACR are dumb and know nothing about guns. This is a HK416 with a crane stock. In all honesty, there are so many things wrong with the model that if I made my usual list of nitpicks, it'd be very long. You should work on your modeling.
Btw, Airsoft megastore sucks big fat rooster, never ever buy from them. AirsoftGI is the only place you should buy airsoft from if you live in the States.
ALSO: The JG614 has a stuffty shimjob and the spring is too powerful, if you actually have the gun, you'll want to upgrade the stuff out of it.