[BrokenBird]

For example, I found for 370$:

G&G GR16 Carabine COMBO PACK

* G&G GR16 Carabine with ABS upper receiver
o detachable carrying handle
o 325 fps
o Clear lower receiver
o Nylon fiber pistol grip
o handguard and one piece hop-up chamber
o 14mm- threaded one piece metal outer barrel, 6 position retactable stock
o Steel gears, brass bushings
o standard spring guide
o nylon fiber piston
o Metal Parts: flash hinder, front/rear sights, outer/inner barrels, trigger, bolt stop, fire selector, ejection port cover, trigger guard, magazine, front/rear sling mounts, forward assist knob
o COMBO Package include: Airsoft gun, Magazine, 3000rd 0.2g BB, 1400mA high quality battery, Standard charger, Shooting glasses, Tactical rail, Instruction manual

Would I be happy with this? And is it easy to find a replacement lower receiver in black abs or metal?