These were designed with short dwell time in mind in an effort to keep things as smooth recoiling as possible and to work to provide a better experience for the shooter in regards to gas to the face. They run great unsuppressed, but ultimately were designed around being run with silencers in mind.
The tech spec highlights: 14.625" 4150CMV 1:8 Twist 223 Wylde Continuous taper profile (heavy) from .9" to .8" at the gas block's shoulder, with a .750" gas block journal. .110" gas port
