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Posted: 11/2/2006 7:04:47 PM EDT
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After a range session and routine cleaning I did a "Safety Check" as per operation manuals: 1.Pull the Charging Handle to the rear and release it. Place the safety on SAFE. Squeeze the trigger. The trigger should not fall.. PASSED 2. Place the safety on FIRE. Squeeze the trigger and hold the trigger to the rear; the hammer should fall. Pull the charging handle to the rear and release it. Release the trigger. You should hear a click as you release the trigger. Squeeze again; the hammer should fall.. FAILED on the 3rd try. Passed "Safety Check No.1" five consecutive times but failed "Safety Check No.2" on the third try. As I slowly release the trigger, the hammer would fall. I did the test several times and it would fail "Safety Check No. 2" on the 3rd try. I was paranoid with the "Safety Check" test results. To try rectify the problem, what I did is pull the charging handle and release, set the safety on SAFE, then FIRE, then AUTO several times. Redo the safety check and PASSED continously both "Safety Check 1 & 2" Can anybody explain what happened. Is there something wrong with my carbine? Any safety concerns and things I should check? No problems were encountered at the range both at SEMI and FULL AUTO, it was just the test results I was paranoid about. My carbine is a Colt M16A1 (14.5in). |
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With a slow trigger release, you have the chance of slightly pulling back on the trigger and tripping the hammer. Try the test again, and this time don't be so slow on the trigger release, Or if you just feel the urge to do the every so slow trigger release during live fire, then you will need to retime the disco for a longer disco retainment to prevent you from finger stumbling/bumping. |
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The FCG is around its later service life, but still within spec for use. It's the very slow release that is causing the problem, and chances are you a bumping the trigger when you do the slow release (slightly pulling back on the trigger when the hammer releases). You can either retime the disco, or just replace the hammer and disco if it starts to act up during real use some time later down the road. To retime the disco, you will remove metal from the disco on the front/bottom edge where it contacts the front of the trigger. Ideally, you want about a .003 free gap between the hammer sear, and the disco sear when the hammer is lowered back with the trigger at rest. My guess is that currently, the free gap is around the .010 range, so not a lot of metal needs to be removed from the disco limiting edge to get it back to it’s like new spec. |
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Try this, Selector on Semi, hammer at rest. Hold the trigger to rear and cycle the action. While continuing to hold the trigger to rear rotate selector from semi to safe. Hammer should disconnect as normal and not fire. If it does fire, replace disconnector spring, and repeat the test. If it still fails then replace the disconnector. Same advice for your previously mentioned issue. www.armstrongsarmory.com |
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