Black Rain Ordnance SPEC15, 5.56mm, 10.5 Barrel, 12 Handguard OCL Polonium 556 Complete Upper

697067883075-Black Rain Ordnance SPEC15, 5.56mm, 10.5" Barrel, 12" Handguard, Suppressor Ready Complete Upper Receiver664533654132-Otter Creek Labs Polonium 5.56 Duty SuppressorThe Black Rain suppressor-ready upper and Polonium suppressor bundle offers a professional-grade solution for shooters who need a compact, rugged, and truly suppression-optimized setup. Built for tactical users, law-enforcement professionals, and dedicated enthusiasts, this pairing brings together a purpose-built DI upper and one of the most respected hard-use 5.56 suppressors on the market.The Black Rain complete upper is engineered from the ground up for suppressed operation. Its 10.5" stainless steel barrel with a 1:7 twist delivers dependable accuracy, while the 1/2"x28 threads ensure compatibility with a wide range of muzzle devices and suppressor mounts. The 12" hybrid M-Lok handguard provides generous accessory space and is specifically designed to accept suppressors up to 1.90" in diameter, letting 2.2" of the can nest inside the rail for a tighter, more maneuverable profile. A nickel-boron-coated bolt carrier group rounds out the package, offering low-friction operation and exceptional durability for high-volume or high-duty-cycle builds.Paired with the Polonium suppressor series, this bundle becomes a serious performer. The Polonium is purpose-built as a quiet, duty-rated 5.56 can that thrives under hard use-short barrels, rapid strings, and rough field environments. With a 6mm bore, it also accommodates 6mm/.243 cartridges, giving shooters added flexibility. External weight-reduction cuts keep the suppressor strong while increasing surface area for faster cooling, and its built-in internal and external flash-hiding features dramatically reduce signature, particularly during night-vision or low-light work. Offered in both standard and K lengths, the Polonium line has earned its reputation through performance, not marketing spin.Together, the Black Rain upper and Polonium suppressor form a reliable, suppressor-optimized rifle solution built to withstand hard use in real-world conditions-ideal for anyone building a dedicated defensive carbine, patrol rifle, or compact tactical setup.SpecificationsBlack Rain Suppressor-Ready Complete UpperDirect-impingement complete upper10.5" stainless steel barrel, 1:7 twist1/2"x28 threaded muzzle12" hybrid M-Lok handguardAccepts suppressors up to 1.90" diameter with 2.2" handguard nestingNickel-boron-coated bolt carrier groupDesigned specifically for suppressed buildsPolonium SuppressorDuty-rated hard-use 5.56 suppressor6mm bore; compatible with 6mm/.243 cartridgesHighly effective internal & external flash hiderExternal weight-reduction geometry for faster coolingBuilt for superior flash reduction under night visionKnown for exceptional sound-to-size performance ratioBuild a compact, suppression-focused rifle system trusted by professionals-get this Black Rain & Polonium bundle at Battlehawk Armory!