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Posted: 4/16/2012 7:38:59 AM EDT
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Just took two AR's I built to the range yesterday. I used the Federal Bulk XM855 5.56 green tipped ammo. Most of the time, it went bang when I pulled the trigger; as I fired more and more rounds through the rifles it operated more reliably with only a few duds.
I would take the duds, check the primer (it was indented, and it was more than just a little dimple), then reload for another go. Most of them went bang the second time. Sadly I did not have another box of ammo to check it against. About 5 of them were actually duds that wouldn't go bang. Anyone have similar experiences with this ammo? Is this to be expected? I've used 50+ year old Greek HXP 30-06 without any issues. Suggestions? |
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When I remove the bolt from the upper action, should the firing pin be loosely moving around? If I tilt it towards the bolt face will the firing pin protrude from its hole?
Should I not lubricate the firing pin then? I am used to the M1 which does not recommend greasing the firing pin. The AR is new to me. Should I use CLP on it for lubrication? |
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Quoted:
When I remove the bolt from the upper action, should the firing pin be loosely moving around? yes If I tilt it towards the bolt face will the firing pin protrude from its hole? only with the bolt pushed all the way into the carrier Should I not lubricate the firing pin then?I don't lube mine at all. If you choose to, do so only very very lightly, like one drop. I am used to the M1 which does not recommend greasing the firing pin. The AR is new to me. Should I use CLP on it for lubrication?unless you have another modern lube you prefer, that's a good one to start with |
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First thing to do is check the orientation of the hammer spring. Note that the legs of the hammer spring come from underneath and rest on top of the trigger pin. http://img.photobucket.com/albums/v503/AR15forme/IMG_5660.jpg Came to post this, but I didn't have such a great photo. A friend of mine had the exact same issue. He had the hammer spring installed wrong. Very easy to do, we compared it to my build and it was easy to spot, flipped it around at the range and every round went bang after the swap. |
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Quoted:
Quoted:
First thing to do is check the orientation of the hammer spring. Note that the legs of the hammer spring come from underneath and rest on top of the trigger pin. http://img.photobucket.com/albums/v503/AR15forme/IMG_5660.jpg Came to post this, but I didn't have such a great photo. A friend of mine had the exact same issue. He had the hammer spring installed wrong. Very easy to do, we compared it to my build and it was easy to spot, flipped it around at the range and every round went bang after the swap. I second this. Not only did not every round go bang, but my trigger pin kept walking out on me. Felt like an ass when I figured out my mistake, but its an easy fix....and life goes on. |
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Perhaps a silly question but would the direction I put the trigger and hammer pins in make a difference? I put them in left to right, but the pins have those two grooves in them? Would their orientation effect anything? Left to right shouldn't matter. But some are hammer specific and trigger specific, and some don't matter. If the groove is in the middle its for the hammer, if the groove is towards an end its for the trigger. If the pin has both sets of grooves it doesn't matter. (sounds like thats what you have) |
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Yeah it was one of those easy to overlook things that I thought I was "too good" for. Lesson learned. You learn by doing and making small mistakes. Each time something like that happens and you fix it, you learn things that will be a big asset in the future if something goes wrong. 
Glad it wasn't something really complicated. 
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