The Magpul PTS Metal Body is a replica of Magpul's Billet Aluminum AR receiver. The PTS version is also built from aluminum, however it cannot in any way be used for a real firearm. This body features a lot of texture and grooves that give it an aggressive and unique look. In front of the magwell are grooves for gripping the lower receiver; although Magpul Dynamics advisers, Chris Costa and Travis Haley, might not advise it. On the left side of the magazine well is a clearly engraved Magpul logo. The fire selector images are red and white on both sides and feature bullet shaped hieroglyphics instead of words. The dust cover on this metal body is designed to stay open at all times, to emulate a real gun's dust cover when firing, the imitation bolt does a sufficient job to keep dust and debris out of the gun with the dust cover open. The trigger guard is built into the gun and shaped in such a way to make it easier for shooters in the cold to fire with thick gloves on. The bottom of the trigger guard is also contoured to relieve stress on the second finger when firing for a long time. This is a well designed professional training piece from one of the leading gun accessories manufacturers in the world, what else did you expect?