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Posted: 4/9/2015 6:22:50 PM EDT
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Hello All,
I am building my first AR and I have ran into an issue when I completed installation of my JARD Adjustable trigger. The book (The AR-15 Complete Assembly Guide by Walt Kuleck) that I am consulting while assembling the gun has stated that "If the hammer is not cocked, the safety should not be able to move from the "Fire" position." Everything else works correctly within the trigger system meaning the safety and disconnect work as described in the instruction that was sent with the trigger. But I can rotate the safety selector switch from "Fire" to "Safe" while the hammer is not cocked, and I don't see what is suppose to stop the selector from rotating. Any help would be great, thanks |
Note how the tail of the trigger moves up in to the circle that is the safety switch? The adjustable trigger has two screws, one at the front and one in the back. The front one screws down and adjusts the over-travel, or how far back the trigger can be pulled, the rear one screws up and adjusted the safety engagement, and you can adjust it so the safety works with the hammer down. It won't hurt anything, you just won't be able to see if the rifle is cocked with the safety. You can also adjust the length of the first stage pull with the screw on top of the disconnect. |
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Bottom lob of the oem hammer is oblong, and as the hammer goes into the un-cocked position, when you release the trigger, the front of the trigger is held slightly downward, the tail of the trigger held slightly upwards, which block the selector from being able to go into the safe position.
It's a feature on the rifle to make sure that GI has the rifle chamber loaded (has racked a round into the chamber on a fresh charge), before he can put the selector into safe. As for after market triggers, so have these feature, while some do not. |
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No worries, and if you looked at the above GIF, you noticed that the front of trigger needs to lower down to allow the front trigger sear to engage the hammer sear, so if the selector is in safe and the rifle un-cocked, the the selector is blocking the rear of the hammer from raising up to allow this to happen.
Bluntly, it's one of the main reason for the hammer bottom oblong lob, and why some after market manufacturers fail to incorporate this lob into there hammers, is beyond me. So now you have a selector that can be flicked to the safe position with the hammer un-cocked/empty, but if you go to try to charge the rifle in this condition (or even try to do a live round in the chamber check since it could be empty with the selector on safe, your pretty much screwed instead. |
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