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Posted: 6/29/2005 7:54:52 AM EDT
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Hi, Is the MGI "Super 2X Recoil Spring" for tele-stock or fixed? It doesn't say on the site. Eitherway, let us know how well does it works? Thanks! |
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A music wire spring will retain its spring characteristics better over a longer number of cycles than a standard spring will. An extra power spring not only helps with the compression part of the cycling, but also provides more positive closing of the bolt and carrier during bad conditions such as dirt, snow, ice, etc. It will be a bit harder to pull back the charging handle. It is possible that with some combinations of heavy buffers or weak gas pulse that it may induce short stroking. The only way to tell is to try it and see. If there is any problem, we will refund the purchase price. |
wouldnt this cause problems? the spring would be longer/stiffer in a carbine than it would be in a rifle buffer set-up since the rifle set-up is longer. not sure how this would work. |
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I had similar questions when this item was first introduced, and I asked Mack directly about these same concerns. His answer to me was, "I designed it to work with both, and it works with both". Knowing Mack as well as I do, that was all the answer I needed. Remember that with different gas system lengths, there are different needs in springs, and the heavier compression of the spring in the shorter carbine tube will provide the difference in spring compression pressure. From what I understand, the way it is made is that it is 2x the rifle spring power when in a rifle tube, and when you compress it into a carbine tube, it is then 2x the carbine spring power. It is constructed so that it won't bind up in either application. Again, with our money-back policy, there is no risk in trying it, if you think it could benefit your particular application. |
so what i get from your explanation is that the spring has a tension of 2x regardless of length of compression. i might have to try this one out. thanks for explaining it. |
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Just remember that if the gun is cycling at(or near) the minimum speeds, due to heavy buffers, heavy carriers, minimum gas port diameter, or whatever, then adding an extra power spring can be enough to make it short stroke. If you add the 2x spring, and it works fine, then you know that you were not operating at near minimum cycling previously. |
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I personally use the RRB buffer, M16 carrier, D-Fender, and standard recoil spring on my gun, when using any carbine-length barrels. I used the heavy recoil spring, and it did not cause my gun to short stroke with my barrels. However, I did find that it was more difficult to pull back the charging handle. Since I also have my gas port drilled open and use the MGI Adjustable Gas tube, I am able to tailor my gas pressure to whatever I want. This allows me to adjust everything to work together no matter what arrangement I select in buffers, carriers, or springs. For a non-adjustable gas system, you have to try and see if the spring will work or not. Usually, if the barrel has a couple thousand rounds thru it, it has an eroded gas port which sends too much gas into the action and needs to be slowed down. In some cases, the RRB is enough by itself, or in some cases and additional spring force is needed. This is directly related to the way the gas system is on each particular gun, due to erosion of the gas port. It is not really totally predictable how these items will work on each individual situation because of this. Generally I would say that if you have a brand new barrel with a correctly drilled gas port in a carbine, you will probably not need the 2x spring. Even the heavy buffer may be a bit too much mass for a new barrel with a gas port drilled to minimum dimensions. These items were primarily designed to be installed in a gun which has been fired some, and is showing signs of needing to slow down the action speeds. They may not be ideal in a brand new barrel with no erosion having taken place yet. Regarding the cycling life of the 2x music wire spring, I'll have to get a hold of Mack to see if he has some test data that he can provide me with. A music wire spring that is properly made is well known to have superior spring properties, so that is not an issue. It is only how much more cycling life that I have to find out. I'm sure he will provide me with the info you want. |
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