The Huldra Piston System Revolution
In 1957 Eugene Stoner developed the AR15 / M16 rifle. The design of the rifle utilized the gases that pushed the bullet down the barrel to cycle the action of the semi-automatic and full-automatic AR15 / M16 rifle.
These gases are vented into a gas tube through a hole on the barrel (the Gas Port). The gases travel back towards the receiver of the firearm and use its pressure to push the bolt carrier backwards towards the stock of the rifle.
This utilization of gases to cycle a firearm's action is known as Direct Impingement. It is the biggest flaw of the AR15 / M16. Because these gases are released into the receiver, a layer of carbon and burnt gases coat all the moving parts of the firearm.
This also leaves a lot of heat inside the receiver causing undue stress and wear on many critical parts. All of these issues give the AR15 / M16 a reputation for being unreliable and having issue like failure to feed and failure to eject. In a combat situation this could be the difference between life and death.
The Huldra Difference
Huldra's Adams Arms Piston System uses the same gas port on the barrel to work the action of our inverted piston.
Instead of directing the gases into the receiver, they go into a gas plug and drive rod sleeve. The gases are contained inside the drive rod sleeve and push the bolt carrier rearward using the gas pressure to cycle action.
Once the action is cycled the remaining gases are pushed out of the front of the gas block, purging the system and keeping the gases out of the face of the user and the receiver.
The end result is a firearm that functions and feels like an AR15 / M16 but burns cooler, cleaner, and is more reliable. The Huldra Mark IV has gone further than just a patented revolutionary operating system. All of the Adams Arms gas piston components are treated in today's most technologically advanced coating process on the market. The gas piston system and block are Melonited and the bolt carrier is ion bonded. All of the Piston System parts that operate this rifle come with a lifetime warranty.