Guntec USA AR-10 5.5in Fake Suppressor .300 AAC/.308 Cal Black 5.5FAKE-AR-308. 5 " Total Length 1/2 X 28 Thread Extends Barrel Length 5.5 Inches Functions As A Barrel Shroud Laser Engraved With Military Style Markings .223 Cal Specifications for Guntec...