Over time, any shooter’s gun barrel can take a beating from the stress it endures after each fire.

300 Below has developed a computer-controlled scientific dry cryogenic tempering process that relieves stress in firearm barrels

The CRYO-Barrel Stress Relief takes only 72 hours to process at 300 Below’s facility in Decatur, Ill., and will permanently improve any shooter’s weapon for the better.

Stress normally causes a barrel, whether in rifles, pistols, or shotguns, to bend or warp as it heats up from repeated firing. This warping causes a stringing, walking or wandering effect in the shot group.

After 300 Below’s patented Cryo Accurizing process, the movement of the barrel is significantly reduced. The end result is a firearm barrel with proven, increased performance, resulting in significant accuracy improvements and extended barrel life. Firearms are also noticably easier to clean and maintain, ensuring that any shooter’s weapons stay operational and on target in times of critical need.

Many crew-served military weapons (such as machine guns) are fired at their cyclic or rapid rates for long durations, thus becoming more prone to error from their extremely hot barrels. This often may lead to permanent damage of the weapon.

After a firearm is frozen, 300 Below’s process also reduces the likelihood that a weapon will be damaged when firing for extended periods of time, as shifting and warping of the molecular structure is dampened significantly after our one-time irreversible treatment. Shotguns, rifles and pistols are all shown to benefit significantly.

The CRYO-Barrel Stress Relief is available for casual shooters, competition shooters, law-enforcement personnel, and military service members around the world.

Those interested in the CRYO-Barrel Stress Relief process should call 800-550-CRYO (2796) for custom pricing.

There is a simple three-step process for anyone looking to have their gun barrel treated:

  1. Pack up one (1) barrel or barreled action properly for shipping.
  2. Send it to 300 Below, Inc. at 2999 Parkway Drive, Decatur, IL, 62526
  3. After calling for pricing, enclose a check made payable to 300 Below, Inc. (This includes return shipping for one barrel.)

The gun barrel is then processed within 72 hours and shipped it back with $300 of insurance.

For more information on the CRYO-Barrel Stress Relief process or other products from 300 Below, visit

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