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Posted: 8/7/2006 12:54:15 PM EDT
| Please help. I've read a lot of failure to feed problems on this forum and this one is a little different. The most noticable thing about this problem is that after the last round, the bolt fails to blow back and catch. I don't know if that is enough to diagnose it as a gas problem? Spring and buffer as well as the upper are from Model 1 Sales, brand new and shot for the first time on Saturday. During the cycle, rounds will fail to feed entirely or get jammed with the bolt halfway closed. |
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From the troubleshooting stickey at the top of the page. (It does initially sound like a gas issue) perform this test (looks like you may have already experienced some/all of these symptoms. ie--bolt not locking back on last round). "---TEST FIRING PROCEDURE--- -Unload the rifle and verify that it is clear. -Check the bore for obstructions. -Load the rifle with one round from the magazine. Use quality ammunition and a proven magazine for this. -Aim downrange and fire, the bolt should catch on the bolt stop. Hold the rifle as loose as possible. -Reload and repeat the process if the rifle does not lock open Depress the bottom of the bolt stop before firing this time. This allows for weak magazine springs, sticky followers, or an overly strong bolt catch spring. -If the bolt does not lock open then there is a gas system problem. Investigate and repair the problem. -If it only locks open with the bolt stop depressed, repeat the process with a different magazine. If the rifle still fails to function then look at the bolt stop as a probable culprit." check the gas key to make sure it's tight. |
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