The Shadow Systems SS-6040-CA U526 is a California-compliant 5.56 NATO semi-automatic rifle built around a 16" hybrid-profile, chrome-lined barrel and an intermediate-length gas system. Its black receiver with full-length Picatinny rail, lightweight low-flex M-LOK handguard, and Shadow Systems stock and grip create a cohesive, duty-ready platform with smooth recoil and consistent performance across a wide range of ammunition.

This U526 configuration uses a 10+1 capacity setup to meet California regulations while preserving familiar AR-style handling. The elite two-stage duty trigger offers a clean, predictable break for precise shots, and the ambidextrous controls support a wide range of shooters. Ideal for range work, structured training, and general-purpose rifle use, the SS-6040-CA U526 reflects Shadow Systems’ focus on thoughtful engineering and refined craftsmanship in a modern 5.56 rifle.

Key Features:

• Manufacturer: Shadow Systems
• Model: U526 SS-6040-CA
• Caliber: 5.56 NATO / .223 Rem
• Condition: New
• Action: Semi-Automatic, Direct Impingement
• Barrel Length: 16" Hybrid-Profile, Chrome-Lined
• Capacity: 10+1
• Safety: Safety Selector / Two Stage Safety Selector
• Stock: Black Polymer Shadow Systems Stock
• Grip: Black Polymer
• Sights: Picatinny Rail (no sights included)
• Handguard: Lightweight Low-Flex M-LOK Handguard
• Twist Rate: 1:7"
• Receiver: Black Receiver With Picatinny Rail
• Muzzle Device: Maelstrom Flash Hider
• Included Accessories: Rifle Bag, 10-Round Magazine Or COMPMAG, Owner’s Manual, Chamber Flag, Cable Lock