LWRC REPRMKIIU7BF16SC REPR MKII 7.62mm NATO 16.1" Spiral Fluted Complete Upper for CA ComplianceThe LWRC REPR MKII 7.62mm NATO 16.1" 5/8x24 1:10" Spiral Fluted Bbl Black CA Compliant Complete Upper is a high-performance upper receiver designed to deliver precision and versatility in shooting. The heart of this upper receiver is LWRC's patented Adjustable Gas Block and short stroke gas piston operating system, which provides better performance and greater adaptability. The short stroke gas piston operating system eliminates hot gases being vented into the receiver and bolt carrier, resulting in superior reliability and ease of cleaning compared to direct impingement rifles. The Adjustable Gas Block provides a high degree of adaptability, allowing the rifle to be finely tuned to fit the shooter's ammunition preferences, use with a suppressor, and firing the rifle in adverse shooting conditions. The REPR MKII's versatility and precision are enhanced by its spiral fluted barrel, which not only provides a unique appearance but also reduces weight by 20% compared to barrels of the same diameter and increases the surface area for faster cooling after multiple shots. Additionally, the upper receiver features an Ultra Static 4-port muzzle brake to reduce barrel jump and felt recoil, and a full-length Picatinny rail for use with optics. The upper receiver is CA compliant, ensuring that it complies with California's strict firearm regulations. In terms of accuracy, the REPR MKII's trigger is composed of the Geissele SSA-E, a 2-stage trigger with reduced first and second stage pull weights, providing a smooth pull with light take-up and a clean break. Another feature that enhances accuracy is the included Magpul PRS Gen3 stock, which can be adjusted to the shooter's desired length of pull and cheek height without the use of tools. LWRC REPR MKII 7.62mm NATO 16.1" 5/8x24 1:10" Spiral Fluted Bbl Black CA Compliant Complete Upper REPRMKIIU7BF16SC