Introducing the new Fostech Stealth Series Raptor Model, 5.56 caliber Billet Receiver AR-15 Rifle. All Stealth Series Rifles feature Fostechs highly advanced Billet Cut upper and lower receivers. These remarkable receivers are made of a proprietary blend of magnesium and aluminum alloy making them ultra-light in weight while still being immensely strong and durable. In fact, Fostech Stealth series rifles are quite possibly the lightest, most advanced AR-15 rifles on the market today and a must-have addition to any collection. Coming in at only 5.13 lbs, this rifle can be carried all day and yet is tougher, stronger, and more accurate than most other AR rifles regardless of weight or class. The upper receiver incorporates a Picatinny rail which aligns perfectly with the rail on the free float handguard, so the entire rifle is fully optics ready. Fostech Stealth Raptor Series rifles also feature a Faxon 1 in 8 twist 16" gunner profile barrel, a lightweight Fostech Nickel Boron bolt carrier group, and the newly designed Mach-1 16" M-LOK compatible lightweight rail. The 16" rail provides a highly functional full shroud for the barrel and gives the rifle a beautiful futuristic look as well. The Raptors mid-length gas system is anchored by Fostechs .625 low profile gas block ensuring ultra-smooth cycling and reliability, with less felt recoil and barrel rise. All of these premium features are designed to allow the rifle to present a very trim profile while also making it a workhorse capable of long days on the range. Fostech designed this rifle to hold up under even the harshest of combat conditions while still being one of the lightest AR-15 rifles in the world. As such, they are also ideal for law enforcement or security forces where dependability and ease of carry are a must. On top of all that, they are an absolute work of art and could proudly be displayed as such when not in use. The Stealth Series Rifles come standard with Flip-Up sights and is Cerakoted in classic. O.D. Green. Each rifle is completed with a premium grade Fostech Lite Castle Nut, an ergonomic Fostech Sable Pistol Grip, an MFT Minimalist Stock, and Fostechs highly sought-after Strake Brake Compensator. Rifle ships in a hard case and comes complete with warranty cards, and one 30 round magazine.