Specifications include, but are not limited to: Rifle, Core 15, 10.5", ROSCOE Rifle, Core 15, 10.5", Roscoe, SBR, KMOD 9.5" With MBUS Front and Rear. Bid Price Shall Include Cost of 40 Core 15 10.5" Roscoe SBR packages which must contain: MBUS Front & Rear Sites, 1 magazine, and 1 hard case per rifle. Rifle Specifications: Brand: Core Rifle Systems Model: Core 15, 10.5", Roscoe, SBR, KMOD 9.5" Caliber: .223/5.56 NATO Weight: 5.6 lbs. / 2.54 Kg Unloaded Barrel: Core 10.5" 4150 CMV Gov’t. Profile, Black Nitride Gas Tube: 304 Grade Stainless Steel Lower Receiver: Core Mil-Spec Forged 7075-T6, Type III, Class II Hard Coat Anodized Finish, Beveled Magwell for improved reloading speed, Machined Chevrons on Magwell, Bullet pictogram markings. Upper Receiver: Core Mil-Spec Forged 7075-T6, Type III, Class II Hard Coat Anodized Finish, M4 Feed Ramps, (1913 Picatinny rail flat top) with dry lube internal finish and laser engraved T-Markings. Bolt Carrier Group: Mil-Spec Carpenter 158 Steel Bolt, M16 Chrome lined 8620 Steel Carrier, Mil-Spec staked Gas Key, Tool Steel extractor, Shot Peened. Charging Handle: Core HARDCORE Billet Charging Handle V.1 Flash Hider: Mil-Spec A2 9.5" Keymod system Rail Handguard Stock / Grip: Core Six Position Retractable Stock. Grip: A2 Trigger Guard: Core Oversized removable. Magazine: Mil-Spec 30 Round Polymer. Front Sight: Magpul Polymer MBUS Front Back up sight Rear Sight: Magpul Polymer MBUS Rear Back up sight Standard Mil-spec Semi - Automatic Fire Control Group Hard Case