Complete Piston System In A Super-Light Package
The Evo Ultralite upper combines Adams Arms’s proven gas piston operating system with a small-contour barrel and the lightweight Samson Evolution handguard system for a gun that’s easy to carry for extended periods. This is a complete upper, ready to snap onto the lower of your choice. Adjustable piston-driven system keeps gas and residue from being blown into the action, so bolt and receiver stay cleaner, reducing malfunctions related to fouling. The skinny 16" barrel is chambered in 5.56mm NATO with an Adams Arms compensator to control muzzle rise so the Evo’s light weight doesn’t mean you have to cope with more felt recoil or sacrifice speed of follow up shots. Continuous rail across receiver and top of handguard, plus two bolt-on rails that let you position accessories exactly where you need them. Available with Carbine-Length gas piston configuration that taps gas from farther up the barrel than a standard carbine length gun for smoother cycling and easier extraction.
AR-15, Issue:10, Page:016
Big Book Catalog, Issue:67, Page:016
SPECS: 6061 T6 aluminum receiver and handguard, Type III hardcoat anodized, matte black, with dry-film lubricant coating. Gas Block, Piston Tube, Bolt Carrier – Steel, black oxide finish. Piston – Stainless steel. Barrel – Chrome-moly steel, Melonite® hardcoated, matte black. 16" long, .625" O.D. at gas port, .550" O.D. behind muzzle. Chambered in 5.56mm NATO. 1-7" rifling.