KAC-Knight’s Armament 7.62 SR25 K3 Upper Receiver Kit, 16″ (121479)

The SR-25 K3 is the commercial version of the M110K3, purpose-built for rapid precision fire at mid-range distances. Its compact and lightweight design makes it easy to carry, quick to deploy, and adaptable for a wide range of applications. The high-pressure dual ejector bolt enhances both suppressed and unsuppressed performance in challenging conditions while extending service life. Its URX6 handguard is impact-resistant, with seven sides of M-LOK slots and a continuous top MILSTD-1913 rail for easy attachment of accessories. Additionally, the 7.62mm open brake reduces recoil and is compatible with KAC 7.62mm QDC Signature Reduction Devices.

Specifications: 

Barrel:   

• 16” (40.6 cm) 1 in 10” (25.4 cm) Twist
• 5R Cut Rifled 416R
• Dimpled Hybrid Medium Profile

Caliber: 7.62 mm NATO / .308 Win

Enhancements:

URX6 Handguard

The URX 6 is an advanced, self-indexing handguard designed for exceptional shift resistance. It features a full-length 12:00 MIL-STD 1913 interface rail complemented by seven sides of M-LOK negative space mounting slots. This handguard seamlessly slides over the attached barrel nut, with precision alignment facilitated by an anti-rotation index tab and slot mechanism integrated into the top rail of the upper receiver. The anti-rotation and alignment elements are sleek and unobtrusive, eliminating any external snag or catch points. The handguard is secured by a robust retention nut that exerts considerable force at the attachment point, ensuring maximum stability and resistance to impact-induced shift.

Reduced Profile Charging Handle Latches

The included ambidextrous charging handle has undergone a refinement with reduced lever lengths by .016” (4mm) to mitigate the risk of inadvertent snagging or activation. Despite their abbreviated design, the medium-length latches retain ease of accessibility, ensuring seamless operation even when wearing gloves.