The K9 16" features an intermediate length gas system with an optimized gas port to run reliably suppressed and/or unsuppressed. The K9 continuous taper is the most effective profile to dissipate heat from hard use. With weight shifted to the back of the barrel, modern attachments on the front of the rifle create a perfectly balanced and better handling rifle. Updated target crown carried over from the Purebred series. Features improved harmonics, fit and finish. This barrel serves as an HBAR for restrictive states. NOTE: COMES WITH INTERMEDIATE LENGTH GAS TUBE Barrel Length 16 Barrel Weight 34.5 oz Barrel Material 416R Barrel Caliber 5.56 Barrel Profile Continuous Twist 1/7 Barrel Thread 1/2 x 28 Barrel Gas Block Size 0.750 Gas System Length Intermediate Barrel Crown Recessed Target Barrel Finish Nitride Barrel Extension Finish Nitride