Caliber: 5.56 NATO. Faithful replica of Eugene Stoner’s very first AR-15 prototype. Features: Trigger-like charging handle under the carry handle, “slick-side” upper receiver, and stock, handguard, and pistol grip of brown reinforced polymer that replicates the look of original fiberglass furniture. Round cross-section handguard, matte-gray, anodized receiver, skinny A1-profile barrel, three-prong "duckbill" flash suppressor. Capacity: (1) 25-round steel bodied magazine replica. Barrel, 20 in. with 1:12 rifling. Rifle-length gas tube. Internal dimensions conform to modern "mil-spec" standards. As of 2022, only available as a build kit, not as a complete rifle.