Rainier Arms RUC DI 300BLK Partial Upper Receiver - 10.7"

The RUC DI Partial Upper is a high-quality and affordable upper build that features a direct impingement operating system on a Rainier Arms Select barrel, an Urban Combat Rail for a durable and reliable handguard, and a low-profile .750 gas block for accuracy. This build also includes a Rainier Arms Forged Upper Receiver and an A2 flash hider for quiet shooting. Whether you're a beginner or a seasoned pro, the RUC DI Partial Upper is a winning combination that is sure to give you an edge in any situation. Upper Build: Rainier Arms Select 300BLK 1:7 Twist Barrel - 10.7" Rainier Arms Forged Upper Receiver Rainier Arms Urban Combat Rail - 9.5" Rainier Arms Low Profile .750 Gas Block (Gasblock pinned) A2 Flash Hider - 5/8x24