The TRYBE Defense 18 in Medium Profile AR-15 Rifle Barrel has a 1:8 twist and is button rifled.
The specs on this barrel are:
Length: 18"
Profile: Medium
Gas system length: Rifle
Gas Block journal diameter: .750"
Gas block jounal length: 1.1"
Gas port size: 0.081"
Crown angle 11 degress
Thread pitch: 1/2x28
Rifling: 1-8
Material: 4150 Chrome Vanadium
Weight: 1.38lbs
It is not. The interior surface is black nitride coated 4150 CMV material.
We apologize for the confusion here. Although there is a kit model available on the product page that includes the rifle barrel, gas block, and gas tube, the standard SKU option only includes the barrel itself. We highly recommend purchasing the kit if you would like every component of the gas system!
The TRYBE Defense 18 in Medium Profile AR-15 Rifle Barrel weighs 2.20 lbs / 35.20 oz.
Each barrel will shoot ammo differently. I recommend shooting a variety of factory loaded ammo to see what kind it likes best then sighting in your rifle with that ammo. I also suggest shooting different grain weight bullets. For more information, email us at techsales@opticsplanet.com.
If you are planning on using a A2 style gas block and front sight on the TRYBE Defense 18 in Medium Profile AR-15 Rifle Barrel, the gas port is going to be about 12 inches from the receiver. So if you want a longer handguard I recommend using one like the handguard at the link below.
https://www.opticsplanet.com/troy-delta-batterails-mid-length-m-lok.html
The Trybe Defense 18 in Barrel has a gas port size of 0.081"
This TRYBE Defense 18 in Medium Profile AR-15 Rifle Barrel is not dimpled.