Anderson Lower, Bear Creek Upper, 6.5 Grendel on an R15 Frame, Black with 1 - 30 rd Mag.  
The 6.5 Grendel (6.5x38mm) is a popular, low-recoil rifle cartridge designed for the AR-15 platform, known for its excellent accuracy and performance at medium to long ranges (200-800 yards) for hunting (deer, coyotes) and sport shooting, using efficient 6.5mm (.264") bullets. It offers better ballistics than 5.56mm but uses a small rifle primer and fits the AR-15 magazine well, making it versatile for various applications with manageable recoil.