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Posted: 8/18/2006 3:46:59 PM EDT
[#1]
That sounds more like a set trigger rather than a two-stage. A two-stage has a long pull with a point near the end of the travel in which there is a stop. It then takes a bit more pressure to release the sear. Usually, you do not want perceptible movement to release the sear in the second stage. With a two-stage trigger it is possible to pull the trigger all the way to the rear to fire the rifle. If the second stage is too light this can happen when you are taking up the slack in the first stage resulting in a discharge when you are not quite ready. A set trigger can be set up in different ways. Some you push the trigger forward to set, and then the trigger has a very light pull. These triggers usually can fire the rifle with a heavy pull when not set. Another type has two triggers. The rear (usually) is the set trigger. Pulling this one back sets the front for a light release. Again, a heavy pull on the front trigger normally fires the rifle too. The last type is a single trigger in which the first pull sets the trigger, and it requires the trigger to be released and pulled again. The second pull is often quite light. I'm not familiar with the LMT and how it works. But, if it is a two-stage then you should be able to fire the rifle with a single pull. The click seems odd. All two-stage triggers I have used have a noticble stop, but no click. Are there any others who are familiar with the LMT triggers? Dave Edit: missing word. |
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Posted: 8/18/2006 9:45:05 PM EDT
[#2]
You installed it wrong, and best guess, forgot to install the pistol grip screw washer to prevent the grip screw from protruding into the bottom of receiver cavity which prevents the trigger going all the way back down/forward to release the hammer from the disco at rest.
Looking into the receiver with the trigger pull back and the hammer lowered down, the disco sear ( the rear hook) will grab/retain the hammer. As you release/reset the trigger, the trigger top end moves forward and the hammer is released from the disco and caught by the primary sear (the front hook, and higher that the back hook). As you start to pull the trigger, the hammer sear moves/slides down/across the trigger primary sear until the back of the hammer touches the disco sear (hump just above the disco sear). This engagement of the back of the hammer against the disco sear humps adds more tension, and this tension is the second stage of the trigger. Ideally, the creep/movement of the first stage is around 1-3 LB, and then the resistance of the disco against the back of the hammer adds another lb or two. Also, if the second stage is set correctly, once you feel the engagement of the disco hump adding resistances, then next bit of trigger travel will release the hammer from the primary sear (read trigger creep, then hit a wall, then the next feel from the trigger at release being that of breaking a small glass rod). |
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Posted: 8/19/2006 8:10:56 AM EDT
[#3]
The first stage will not break until I let off on the trigger. Then the 2nd stage will break on the 2nd pull of the trigger. The grip screw is not contacting anything, I'm using a magpul grip and there is a good amount of clearance. I even tried working the trigger with the grip screw removed and it still does the same thing.
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Posted: 8/19/2006 2:10:58 PM EDT
[#4]
Something is not right, with a full trigger pull, the hammers primary sear should clear the triggers primary sear.
Pull the FCG and confirm that you did not receiver a .170 FCG since the Bushmaster FCG should be .155 (holes and pins). Also, before pulling the whole FCG, remove just the selector* to confirm that tail of the trigger is not binding up on the selector fire position cut out and preventing full pull of the trigger. * Put lots of thumb pressure on the ejection side of the selector, and while turning the selector from safe to fire position, the selector should slide out of the hole/ past the detent holding it into the receiver. Also on the subject, you FCG looks like this, and does not have any setscrews that you can adjust?  |
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Posted: 8/21/2006 11:43:52 AM EDT
[#5]
Looks like the trigger is OK because it functions normally in my PWA lower.
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