UAC Stainless Steel Spiral Fluted Barrel. This is the first spiral fluted pistol barrel in airsoft market. Constructed by precision CNC with 304 stainless steel. 2 finish available, polished silver and gold. The Gold finish was came from the titanium nitride coating, which is the same coating that used on real steel barrel. 2 markings available. .40 S&W / .45 ACP.
More product details you can find at the official Ultimate Airsoft Custom Company Website.