Features: LWRCI 20-Position Tunable Gas Block Patented LWRCI short-stroke gas piston system offers unparalleled reliability and easy maintenance Monoforge upper receiver with integrated rail-base is stronger than the standard-pattern upper Black Nitride treated LWRCI heavy-profile barrel is precisely torqued in our factory to a consistent torque setting button rifled barrel with 1:10 RH twist Fully-ambidextrous lower receiver controls include the bolt catch and release the magazine release and the safety selector LWRCI Advanced Trigger Guard is oversized to allow for easy operation with gloves Geissele SSA-E 2-Stage Precision Trigger LWRCI Ambidextrous Charging Handle LWRCI Skirmish Sights LWRCI Ultra Brake 4-Port Enhanced Muzzle Brake Magpul MOE+ Grip combines reinforced polymer body construction with comfortable wrap-around rubber overmolding for maximum weapon control in adverse environments Magpul PRS Adjustable Stock Sub-MOA Accuracy - Capable LWRCI applies its own Cerakote: ceramic-based thermoset epoxy finish in 3 color selectionsSpecifications: CALIBER: 7.62 X 51 NATO BARREL: 16.1" WEIGHT: 9.0 lbs (4.08kg) LENGTH: 34.8"-37.6" (88.4-95.5 CM) MUZZLE THREADS: 5/8 X 24 TPI RIFLING: 1:10" RH