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Author Topic: 6. Operating Rod Binding  (Read 5342 times)


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6. Operating Rod Binding
« on: October 20, 2012, 12:54:56 AM »
If the Operating Rod is binding then the force needed to cycle the rifle is lost in overcoming the binding. Inspect for binding between the barrel, receiver group, and the operating rod by installing the rod and bolt in the rifle. As the rifle is tipped up and down, the rod and bolt should be moved from closed to open position and back by their own weight. If there is binding, inspect the tube for dents and the handle for deformation, which will cause binding of the under side of the lug on the cut in the receiver.

It's very common for new stocks to have some binding issues. These stocks are never drop in and require some fitting.

 Tilt Test to test your op-rod you want to perform a "tilt test". This will reveal if the op-rod is binding. The rifle should only have the bolt, gas cylinder, hand-guards and op-rod installed. Remove any grease that may be present. When you tilt the rifle up and down at approximately 60 degrease the bolt and op-rod should open and close under its own weight. If the rifle fails this test inspect for area's where the op-rod is rubbing. Repeat this test with the stock installed minus the trigger assembly. To help determine if an area is binding, apply a thin coat of grease to the op-rod in the suspect area. Repeat the test and look for an indication of the grease being rubbed from the op-rod onto the part that is causing the binding.


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