DPMS DP15 Oracle II Upper Features The DPMS DP15 Oracle II Complete Upper is built around a 16 A2-profile barrel with a durable nitride coating chambered in 5.56 NATO with a 1:7 twist rate suited to a wide range of bullet weights. The M4 feed ramp cuts on the forged 7075-T6 upper receiver ensure smooth reliable feeding while the carbine-length gas system keeps recoil impulse balanced for a shootable rifle build. An A2 flash hider caps the barrel reducing muzzle flash and helping to preserve the shooter s night vision in low-light conditions. The .750 low-profile gas block keeps the handguard s inner diameter clear for a slim snag-free profile. Machined and hard coat anodized black for durability the upper receiver is manufactured entirely in the USA to tight tolerances for a precise fit on any mil-spec lower. The DPMS 13.5 lightweight hex M-LOK free float rail gives shooters ample real estate for mounting lights grips and other accessories without contacting the barrel. A bolt carrier group made from shot-peened mil-spec Carpenter 158 steel comes included along with a charging handle making this a truly complete ready-to-install upper. This combination of proven components makes the Oracle II Upper a straightforward way to build or upgrade an AR-15. DPMS DP15 Oracle II Complete Upper Specifications Manufacturer: DPMS Model: DP15 Oracle II Complete Upper Caliber: 5.56 Barrel Length: 16 Barrel Finish: Nitride Twist Rate: 1:7 Gas System: Carbine Length Handguard: 13.5 Hex M-LOK Free Float Receiver Material: 7075-T6 Aluminum Color: Black Available At: GrabAGun