Knights Armament SR-15 KS-4

Barrel: 16” (40.64 cm) 1 in 7” (17.8 cm) Twist Cold Hammer Forged CrMoV Light Profile Chrome Lined

Caliber: 5.56mm NATO

Weight: 6.62 lbs (3.0 kg)

Length: 32.5” (82.6 cm) to 35.75” (90.8 cm)