I custom built this gun from the ground up. I bought this gun from my friend for 20$ and it wasnt working at all, so i spent over 600$ putting it back together (not including all the accesories). The only original parts left on the gun is the hop-up unit, outer barrel, bolt handle, and the receiver. All the internals, barrel, muzzle cap, spacers, body, sling mounts, and the rail are all brand new. This is my baby. She is worth easily 750$-800$, and that is without all the other things im gonna get soon, ill be putting a flutted outer barrel, an m40a3 stock (body), and a silencer. Pics will be up soon.