Xtreme Effects LLC
Gas System Illuminator
The Gas System Illuminator or GSI, is designed to provide extra light while using a borescope to inspect the gas system of your AR style firearm. By providing light to the inside of the gas tube, checking gas port to gas block alignment is much easier. Although visual inspection of the gas port to gas block alignment is the only way to ensure proper alignment, this can be hard to do with some borescopes. The problem is projecting enough light from the borescope to illuminate deep into the gas system, especially on a dirty gun. As the firearm is used carbon will begin to collect in the gas system making it hard to check for proper alignment.
How it works
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The fiber optic cable is inserted into the gas tube in the upper receiver. It's then slid all the way in so it can be viewed by the borescope in the barrel below. By viewing the optical cable through the gas port in the barrel, alignment of the gas block can easily be confirmed.
How it can help diagnose problems
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Proper Alignment of the gas block opening to the gas port on the barrel is critical on the gas operated AR platform. If the two ports are not aligned correctly there can be a decrease in gas volume to cycle the action. This can very easily cause a gas operated gun to "short stroke" and induce a stoppage, possibly with deadly results. The only way to insure proper alignment is by visual inspection with a borescope. This photo shows a slight misalignment of the gas block by the dark crescent on the left of the gas port. This slight misalignment can reduce gas flow enough to short stroke the gun.
A product demo from School Of The American Rifle.
Follow School Of The American Rifle on YouTube, Facebook, Instagram, and their website. They are an amazing resource!
GSI
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The GSI consists of a light emitter assembly, a dimmer switch, a transformer, and two optical cables. The optical cables are different diameters. One cable is .080", the other is .060". Both optical cables are 20" in length to provide more than enough depth for even rifle length gas systems.
GSI USB
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This is the USB powered version of our Gas System Illuminator. It contains a USB powered light emitter assembly, and two optical cables. The optical cables are different diameters. One cable is .080", the other is .060". Both optical cables are 20" in length to provide more than enough depth for even rifle length gas systems. This version does not include a power source. Simply plug it into a standard USB power source such as a computer or most cell phone chargers.
Small diameter gas port
It can be hard to get enough light up the gas port from the borescope alone to check for alignment.
Having the GSI installed to add backlighting for the camera makes checking alignment much easier.
See what you've been missing
With the help of the GSI it's easy to see proper alignment of the gas block. You can even se fine details like the drop of oil in this gas block.
