Knights Armament 5.56 SR-15 KS-1, 13.7" - Upper Receiver Kit

The KS-1 URG features a 13.7" cold hammer-forged heavy-profile barrel with ball mill dimpling, enabling use of a compact suppressor while improving muzzle velocity and maintaining consistent accuracy under heat. The URX 6 handguard offers exceptional stability with a self-indexing design, anti-rotation features, and versatile mounting options. The E3.2 bolt enhances durability and reliability with dual ejectors, a dual-spring extractor, stress-relieved lugs, and a hard chrome finish, optimizing performance for suppressed, short-barreled carbines.

Specifications and Features:

• Caliber: 5.56 NATO
• Barrel Length: 13.7"
• Barrel Type: 32CrMoV12-10, CHF, Chrome Lined, Dimpled Heavy Profile
• Twist: 1:7
• Muzzle: QDC Flash Hider
• Upper Receiver: SR-15, Notched for URX6
• Handguard: URX6
• Bolt: E3.2