Hello all,
I am sure that you were all thinking this thread had gone away for good, but I was searching thru this great forum of yours, and came across this thread. I felt compelled to write.
I am new to the AR-15 and have just recently purchased a R-15 myself. I have had it to the range twice now, and both times I have had several unexplainable "clicks" with no "bang". There seemed to be no logical reason for this. I would eject the round after a click and the primer would have only the slightest little dent. I am sure that this dent was caused by the firing pin sliding forward on its own as the bolt closed, and was not caused by the hammer hitting the firing pin either too lightly, or thru a gummed up hole, with too much lube as has been described here.
So, because I am new to the AR and have only been reading about them for a short time, I have a couple of questions for you guys that know a lot more about them. I think the answers will help get us to the bottom of this mysterious problem.
In the AR15, is the firing pin designed to be so short that it cannot reach the primer and the hammer at the same time? Like a 1911 pistol, is the firing pin driven forward by the hammer and at some point it leaves the hammer and continues on its own into the primer? If this is the case, why is there no spring holding the firing pin to the rear, so that the hammer can get a good hit on it?
The reason I ask this is that when I close the upper down onto the lower with the hammer in the up position (uncocked), it does not appear to me that the hammer is making contact with the firing pin.
I am not sure how these things are supposed to work, but if the hammer cannot reach the firing pin when it is slid forward in the bolt, that would explain the "clicks" with no dent in the primer. Sometimes the firing pin is slid to the rear where the hammer can reach it, and then you get a "bang".
I think I am going to run a little experiment next time I go to the range to test this out. I will try pointing my gun at the ground and give it a few shakes to see if that affects its ability to fire. If I then point it toward the sky and give it a few shakes and it fires, I will have figured it out.
If, on the other hand, the hammer is supposed to drive the firing pin all the way into the primer, then I guess maybe I have a too short firing pin, or something else is going on that I have not detected yet.
I would welcome any comments on my theory.
Oh, and by the way, not related to this problem, but my gun has an absolutely terrible trigger. Long, creepy, gritty, sticky, about 7 pounds, and you never know exactly when its going to break. I know you all say that this is par for the course for an AR, but for a $1000 rifle, Remington should be ashamed. Especially since their catalog says "And our new hunting single-stage trigger design is as cleanbreaking as they come". What a joke. I am not impressed.