Dark Mountain Arms SA100: This ultralight take-down rifle is designed to be the most versatile single-shot rifle available. The detachable barrel allows the rifle to be taken down to half its length and easily fit into most backpacks while still being quick to put into action. - Packable Design- Less than 17 When Taken Down - 16 Barrel is Threaded 1/2?x28 for Suppressor - Caliber Swap is Easy with just a Bolt Face and Barrel Change - Optics-Ready Picatinny Rail - Made in USA - Veteran Owned and Operated - Specifications - Caliber: 5.7X28MM - Action: Bolt-Action - Length (Barrel Detached): 16.65 - Firing Length (Barrel Attached): 31.78 - Height: 6.88 - Thickness: