William Larson

Will Larson is a veteran of the U.S. Army Infantry and the U.S. Coast Guard where he served as a Gunner's Mate. After leaving the military with almost 10 years of military service he entered into the world of contracting working primarily in Iraq and Afghanistan for 6 years. He is the owner/instructor for Semper Paratus Arms, LLC which teaches AR-15 based armorer and builder courses and he is the master armorer for SIONICS Weapon Systems in Tucson, Arizona. He has completed numerous factory and field armorer courses and a variety shooting courses and has close to 30 years of experience with the AR-15 family of weapons.

Understanding the AR-15 Gas System

March 1, 2017March 1, 2017 by William Larson

The AR-15 Direct Gas Impingement System is a rather straight forward system to understand. When the weapon is fired, gas travels down the barrel behind the bullet. As it passes the gas port, it is diverted into the Front Sight Base (FSB) or Gas Block into a gas tube which carries it into the bolt … Read more