Rainier Arms RUC DI 5.56 NATO 10.5" Partial Upper Receiver Black

Rainier Arms RUC DI 5.56 Nato Partial Upper Receiver Black 10.5 in. Bringing the highest quality parts to the market while offering the best value as well. This partial upper utilizes a direct impingement operating system on their new and improved Rainier Arms Select barrel. Pairing up with their Urban Combat Rail to provide shooters with a rock solid handguard that can take any abuse. Throw in your favorite charging handle and bolt carrier group and you are good to go Specifications for Rainier Arms RUC DI 5.56 NATO Partial Upper Receiver: Manufacturer: Rainier Arms Caliber: 5.56x45mm NATO Barrel Profile: Medium Barrel Twist Rate: 1-8 Firearms Threads Per Inch: 1/2x28 Finish: Nitride Color: Black Gun Model: AR-15 Fabric/Material: 416R Stainless Steel Nitrided Gas Block Journal Size-Diameter: .750 in Handguard Style: M-LOK w/ Top Picatinny Rail System Gun Make: AR Platform Bolt Carrier Group Included: No Charging Handle Included: No Magazine Included: No Condition: New Features of Rainier Arms RUC DI 5.56 NATO Partial Upper Receiver Rainier Arms Select 5.56 NATO Barrel - 16" Rainier Arms Forged Upper Receiver Rainier Arms Urban Combat Rail Length - 15" Rainier Arms Low Profile .750 Gas Block Rainier Arms FHV2 Flash Hider - Black Nitride Package Contents: Rainier Arms RUC DI 5.56 NATO Partial Upper Receiver What firearm models does the manufacturer say Rainier Arms RUC DI 5.56 NATO Partial Upper Receiver is compatible with? The manufacturer says that Rainier Arms RUC DI 5.56 NATO Partial Upper Receiver is compatible with AR-15Rainier Arms RA-RUC-DI-10C-PU: RUC DI 5.56 Nato Partial Upper Receiver Black 10.5 in