Faxon Firearms ARAK-21 Model 7.62x39 16-inch Upper Receiver Assembly

Faxon Firearms ARAK-21, Complete Upper Receiver, Piston Operated, 7.62x39, 16 Barrel, Fits AR-15, Picatinny Handguard, Matte Finish, Black, Includes Bolt Carrier Assembly, MuzzLok 3 Port Muzzle Break and Standard Charging Handle URSSB762 The Faxon Firearms ARAK-21 Model 7.62x39 16-inch upper receiver assembly offers a versatile and innovative solution for your AR-15 platform. Designed with a gas piston system, this complete upper seamlessly interfaces with standard AR-15 lower receivers using only the takedown and pivot pins, allowing for quick installation in less than a minute without any tools. Its modular design features a durable black finish and includes essential components such as the barrel, gas block, muzzle brake, and bolt carrier assembly. The upper also incorporates three full-length Picatinny rails for versatile mounting options, along with insulating shims and a lower recoil lug with a spring guide rod for enhanced stability and durability. The gas system is highly adjustable, with a four-position gas adjuster knob that enables fine-tuning for different shooting scenarios, including a single-shot, gas-blocked setting. Due to its unique design, only a few parts like the firing pin, extractor spring, and ejector spring are interchangeable with traditional AR-15 uppers, ensuring compatibility while maintaining the benefits of the innovative system. This upper is ideal for shooters seeking a reliable, customizable platform capable of handling 7.62x39mm rounds, making it suitable for both tactical and recreational use. Features: * Gas piston system: Provides smooth operation and reduces fouling compared to direct impingement systems * Quick attach interface: Installs on standard AR-15 lowers in less than a minute without tools * Adjustable gas system: Four-position gas adjuster knob for optimal performance in various conditions * Full-length Picatinny rails: Three rails for mounting optics, lights, and accessories * Durable black finish: Corrosion-resistant coating suitable for demanding environments