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Posted: 1/15/2011 5:57:40 PM EDT
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Hey,
What the hell am I doing wrong? I went to change out my cam pin from my stag model 8 to a POF cam pin. I can't for the life of me get the new POF pin in !! Good grief !! So i said to myself could this thing" new cam pin" not be machined properly or am I all thumbs?? So I wanted to confirm this by placing the existing cam pin back and can't get that in now !!!! What the heck am I doing wrong...... Thanks Dan |
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Quoted: Do you have the bolt turned in the correct orientation?Hey, What the hell am I doing wrong? I went to change out my cam pin from my stag model 8 to a POF cam pin. I can't for the life of me get the new POF pin in !! Good grief !! So i said to myself could this thing" new cam pin" not be machined properly or am I all thumbs?? So I wanted to confirm this by placing the existing cam pin back and can't get that in now !!!! What the heck am I doing wrong...... Thanks Dan The extractor should be on the left side of the bolt as you are looking at the bolt face. If you have it turned around, the cam pin won't go in |
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I believe I have the bolt facing the right directon. Wouldn't the pin slide in even if I took out the bolt and fiddle around to see if the cam pin droped in to confirm it is truly round? I did and the existing cam looks out of tlerance at its base almost like a slight ever so slight mushroom. I check again.
Dan |
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I hate to ask a dumb question but should the extractor be at a 90 deg when I look at it? and should the firing pin be slightly exposed when depressed? I have everything back together,but I don't see the tip of the firing pin?
Forgive my spelling it's like $#^% tonight |
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Extractor should be on the left side, opposite the ejection port. When the firing pin is depressed, the tip should come out of the bolt face slightly.
The cam pin will (should not) go in if the extractor is on the wrong side. The cam pin has to be rotated for the firing pin to go in. then insert the cotter pin and make sure the firing pin is secured. It shouldn't fall out. Dave |
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All,
There is a first time for everything and I just needed some help . This is the first AR I ever owned and I was honestly some what timid about what I was doing. When the new cam pin wouldn't go in I was like you have got to be kidding. So I guess I must have turned the extractor somehow. Now I 've got it the new cam roller in and the firing pin. Thanks for the help. |
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Quoted: All, There is a first time for everything and I just needed some help . This is the first AR I ever owned and I was honestly some what timid about what I was doing. When the new cam pin wouldn't go in I was like you have got to be kidding. So I guess I must have turned the extractor somehow. Now I 've got it the new cam roller in and the firing pin. Thanks for the help. That's what we're here for. Now, go shoot it |
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Quoted:
All, There is a first time for everything and I just needed some help . This is the first AR I ever owned and I was honestly some what timid about what I was doing. When the new cam pin wouldn't go in I was like you have got to be kidding. So I guess I must have turned the extractor somehow. Now I 've got it the new cam roller in and the firing pin. Thanks for the help. Everybody was new at one time. Some just act like they were born with knowledge. 
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Quoted:
All, There is a first time for everything and I just needed some help . This is the first AR I ever owned and I was honestly some what timid about what I was doing. When the new cam pin wouldn't go in I was like you have got to be kidding. So I guess I must have turned the extractor somehow. Now I 've got it the new cam roller in and the firing pin. Thanks for the help. When I first put it in my firing pin didn't go through because I didn't have the hole lined up that the firing pin slips through. You got to make sure when you put it in that hole is facing the same way it does on the regular cam pin. I got my first AR back in September and before that I had wanted one for 2 years before I just turned around and got one. Until that time I did a ton of research and reading to learn everything I could about the AR because it was the rifle I had always wanted. |
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Quoted: All I did was replace the roller cam pin. Don't tell me I need to do something else !! If installing on a DI gun, you need a special gas key. In a piston gun (well, MOST piston guns), you just need the pin. The roller pin is a neat idea, but I am suspicious of replacing a single solid part with a multi-part replacement. You're adding failure points to the system. |
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Quoted:
Quoted:
All I did was replace the roller cam pin. Don't tell me I need to do something else !! If installing on a DI gun, you need a special gas key. In a piston gun (well, MOST piston guns), you just need the pin. The roller pin is a neat idea, but I am suspicious of replacing a single solid part with a multi-part replacement. You're adding failure points to the system. Even installing it in a fresh upper, there were still grooves that dug into the upper. I run the roller cam on two of my ARs, and the benefit I see is not in reducing wear. It makes the cycling smoother especially when there is rearward pressure from the bolt stripping a round off a mag. It's a common logic flaw to think that less parts = more reliable. As technology advances, things naturally become more complicated. When you look at the development of the wheel from a wagon to what we have today, It went from a simply bolting on a wheel to a spindle to a multipart wheel bearings which increase the service life and reliability. The roller cam is similar in that it reduces friciton throughout the system. I understand the view that "if it ain't broke, why fix it?" Well, it's not about fixing a problem, it's a about making things better. Often times this means adding to an existing design. |
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Quoted: Quoted: Quoted: All I did was replace the roller cam pin. Don't tell me I need to do something else !! If installing on a DI gun, you need a special gas key. In a piston gun (well, MOST piston guns), you just need the pin. The roller pin is a neat idea, but I am suspicious of replacing a single solid part with a multi-part replacement. You're adding failure points to the system. Even installing it in a fresh upper, there were still grooves that dug into the upper. I run the roller cam on two of my ARs, and the benefit I see is not in reducing wear. It makes the cycling smoother especially when there is rearward pressure from the bolt stripping a round off a mag. It's a common logic flaw to think that less parts = more reliable. As technology advances, things naturally become more complicated. When you look at the development of the wheel from a wagon to what we have today, It went from a simply bolting on a wheel to a spindle to a multipart wheel bearings which increase the service life and reliability. The roller cam is similar in that it reduces friciton throughout the system. I understand the view that "if it ain't broke, why fix it?" Well, it's not about fixing a problem, it's a about making things better. Often times this means adding to an existing design. Hmmm... I think you misunderstood my point. I did not say that it would be less reliable, I said it would add failure points. Whether or not it is more relaible or less relaible remains to be seen of course. I get your point about it making the system smoother. I could see it even ADDING reliability, at least in the short run. But on a defensive weapon, I'd also want to know what the failure modes look like. If it fails, will the rifle still work ("fail operational"), or will it bring the gun down ("hard failure")? |
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Quoted: With the roller cam pin I can diffidently say that my piston AR cycles much smother. Before I had the roller cam pin it felt like more of a violent shove with a lot of force. Now it seems to be more like a smooth rapid push. Sounds cool, I may pick one up and try it out. |
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Quoted: A cam pin is such a small part that you could always put an old school cam pin in one of the compartments on your stock as a spare. I do that anyway. :) But I wonder if the roller cam could fail in a way to make it hard to clear the malfunction.... for example, I wonder if it could fail so that the bolt won't unlock. Probably not.... but I wonder. |
| I asked myself the same question from everything I'm reading I understand that the stock pin should be replaced with a POF cam roller pin. My gun works fine I thought I would be upgrading my gun with the installation of the roller cam. I have a piston stag 8 which works just fine with the stock pin. Did I do wrong? |
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Quoted: I asked myself the same question from everything I'm reading I understand that the stock pin should be replaced with a POF cam roller pin. My gun works fine I thought I would be upgrading my gun with the installation of the roller cam. I have a piston stag 8 which works just fine with the stock pin. Did I do wrong? I have no idea. I'm generally in the camp of not fixing it if it ain't broke, But I can see merit in the concept. OTOH, the failure mode is an issue of concern to me personally. I don't how many of these are in the field, being used, but I haven't heard of these pins causing problems. I personally wouldn't run one in my "goto" gun until I had built a great deal of confidence in it with my second line line, which is what I intend to do. |
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