Features: Monoforge one piece upper receiver with integrated rail-base is stronger than the standard-pattern upper All LWRCI forgings are coined: the material is struck twice in the die for precise dimensional accuracy and a superior surface finish LWRCI Skirmish Back-up Iron Sights LWRCI A5 2-position Gas Block LWRCI Ambidextrous Charging Handle Patented LWRCI short-stroke gas piston system offers unparalleled reliability and easy maintenance LWRCI Advanced Trigger Guard Black Nitride treated LWRCI heavy-profile barrel is precisely torqued in our factory to a consistent torque setting. Cold hammer forged 1:7 twist stabilizes a wide range of bullet types Nickel-Boron coated bolt carrier for unparalleled wear resistance corrosion resistance and permanent lubricity Fully-ambidextrous lower receiver controls include the bolt catch and release the magazine release and the safety selector LWRCI Ultra Combat Grip LWRCI Compact Stock Magpul 5.56 PMAG 30