Plastic parts include: grip, magazine base plate and blow back cylinder. Everything else....METAL This new custom airsoft 1911 weighs the same as the real 1911 .45 ACP. When you pick it up you will be checking the chamber to make sure it is really an airsoft gun. The feel of this gun is amazing. Constructed of metal both internally and externally. The biggest plastic part is the ABS grip styled after the polymer double stack frame. Rack the slide and hear the pure metallic sound as the heavy slide slams home. Squeeze the trigger and the whole gun rocks back sending a jolt down the length of your arm! We did note that due to the large volume of gas needed to push the slide back that the gas temperature dropped quickly when the gun was fired rapidly. Therefore it is suggested that you do not try to empty the entire magazine in one go but fire in bursts to keep the gas from cooling and losing power. Double taps work great! Rear sight is fully adjustable for windage and elevation. Features a railed frame for mounting flashlights and lasers.