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Posted: 11/8/2009 12:14:06 PM EDT
| I have several AR-15s and several buffer springs cut to different lengths to accommodate various bullets. Is there a graph or calculator that can be used to calculate the force required for the spring without firing––cutting––-firing––-cutting to arrive at the proper spring tension. An accurate pull scale measuring the force to pull back the bolt should work in conjunction with the calculations. It has been difficult to find the sweet spot for spring adjustment. Bill |
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Ditto, the standard AR system has a wide range of operating usability in regards to different ammo types in stock form, and if you are having to clip springs to make the system function correctly, there are problem elsewhere with the rig. The gas system would be the first to check for leaks or blockage, but binding and even wedging could be the problem at hand as well.
If reloads, then do make sure that they are loaded with the correct burn range powder for the rig, and even loaded to correct working pressures as well. |
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I understand what you are trying to accomplish. An adjustable gas block is the proper way to go. Adjustable gas stop––Haven't heard of that one but I will investigate. Thanks Not going to work for you. The adjustable gas block are used to limit/lessen the normal amount of gas getting to the system, not increase it. |
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It could be that the gas system is not aligned properly. If this is the case, the rifle isn't getting sufficient gas to make it cycle properly.
1. Check to make sure that there are no obstructions in the gas port on the barrel, gas block, or gas tube. Also check the gas key. 2. Insure that the hole in the gas tube is properly aligned with the hole in the gas block, and finally that the hole in the gas block is properly aligned with the gas port on the barrel. A friend of mine used to have a conical shape machined into the inside of the gas block so that he was sure all the gas from the barrel's gas port was able to enter the gas block if there was a slight mis-alignment. The large part of the cone was the part that covered the barrel's gas port. I thought it was a pretty neat way to insure all the gas from the port entered the gas system. 3. You may need to change buffer, or even butt stock. I had a rifle that wouldn't function with a 6 position stock. As soon as I changed it out to a full length stock with the stock spring and buffer, everything worked properly. I would be very reluctant to clip coils off the spring. You might end up damaging the rifle by allowing too much, or too rapid of movement in the bolt carrier, buffer system. |
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