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Only add two drops of oil between the hammer and trigger where the hammer spring is located. If you chose to use lubrication after cleaning (not recommended), we suggest Hoppe's 9 Lubricating Oil (Model 30128). Repeat this process until the carbon deposit is removed from the trigger. Without any delay, rotate your receiver and use clean cotton patches to wipe off all carbon deposits from the hammer, disconnector, and trigger. Repeat this step a few times until all surfaces inside the trigger housing are wet.
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Use a small squeeze bottle to squeeze white gas into the trigger. Place your lower receiver upside down where the hammer faces the workbench. To clean the ZERO trigger when the trigger is inside the rifle, we recommend using camp fuel or white gas. Use clean cotton patches to wipe off all carbon deposits from hammer, disconnector, and trigger. Make sure the container is covered or has a lid. Fully soak your trigger inside a small container of white gas for about 5 minutes. To clean the ZERO trigger when the trigger is outside the rifle, we recommend using camp fuel or white gas. Read Will P’s review at The Firearm Blog. * Secondary tension screws: Tighten to 14in-lbs (add blue Loctite) * Primary tension screw: Tighten to 8in-lbs (no Loctite) *NOT Compatible with AR-10 or Pistol Caliber Carbines. Undersized and out-of-spec trigger pins will cause the trigger to malfunction. *0.1540 inch diameter trigger pins are required. *ANTI-WALK TRIGGER PINS ARE NOT INCLUDED BUT CAN BE PURCHASED HERE In short, all of the features of the Zero™ trigger are designed to offer a shooting experience that is exceptionally smooth, crisp, and fast. Black Nitride is a heat treatment process that enhances corrosion resistance, improves lubricity, and leaves a fine black finish on the surface of the metal. Zero™ AR-15 triggers are available in two pull weights: 3 lbs and 4.5 lbs. They are available in Black Nitride or Titanium Nitride (MULTiN). The pull-weight and disconnector set screws are also welded after loctite for safety and a lifetime of use. The trigger, hammer, and disconnector are EDM cut and then polished with brass wire to a micron finish in all critical contact areas for a friction-less engagement. The reset is also positive, which facilitates even faster shooting during training or competition. The short 2mm reset makes the Zero trigger one of the fastest on the market.
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