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Posted: 2/16/2014 5:48:27 AM EDT
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The forward retainer pin, I dropped the tiny pin into the hole before the spring ,should have been spring first.
Now it won't drop out, I have tapped it against the bench a few times and it is appears to be stuck in there. This is the stupidest mistake I have made in years and will be finding a local armorer as soon as possible before I screw it up even worse. I'm sure I am not the first guy that has done this, everything else fits perfect. CMMG kit,AR57 lower (AR Fifteen) If its something simple, please throw me a few tips. I am dead in the water here. |
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Quoted:
The forward retainer pin, I dropped the tiny pin into the hole before the spring ,should have been spring first. Now it won't drop out, I have tapped it against the bench a few times and it is appears to be stuck in there. This is the stupidest mistake I have made in years and will be finding a local armorer as soon as possible before I screw it up even worse. I'm sure I am not the first guy that has done this, everything else fits perfect. CMMG kit,AR57 lower (AR Fifteen) If its something simple, please throw me a few tips. I am dead in the water here. Or try squirting wd40 in the drain hole. The aerosol pressure might push it out. Or use a rubber or plastic hammer to rapidly tap the side of the receiver. The vibration might loosten it and it will fall out. You're not the first person to do this. I speak from experience. |
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I have tried tapping it with a small rubber mallet and its been squirted with penetrating oil (Kroil) and its still not moving.
I can visibly see it in the drain hole and it doesn't appear to want to move at all. This is really driving me completely insane, how can the very last little part totally kick my ass and literally trash the entire build process? Darwin award over here please. I do not even know what my next move is but I have a real nice looking paperweight. |
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i would go the opposite direction from oil and use brake cleaner or alcohol, or something that dries it up and lets it slide (fall) out.
i wouldn't think it would hurt the anodizing at all, might make it temporarily a different shade, but reoil will fix that. dry it up and tap it, or try to blow it out. |
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Its looking like the pin from hell is determined to stay right where its at.
brake cleaner, isopropyl alcohol and gun blaster don't seem to help. Thanks for the advice folks, I suggest a big red caution flag for the next moron like me that watches this nice little pin slide right down that hole. They do NOT come back out. The new pin and shortened spring is making sense but how the hell do you cut a little spring like that? I would hack it all to hell for sure, this is a nightmare to say the least. Magnetic paperclip is also a good idea, I see several trips to Harbor Freight coming real soon. God am I a dumbass. Not one Youtube video stresses this fact, do not put the pin in first. I am going to look like a real genius carrying this thing into my local gunshop. |
| Don't be too hard on yourself, I put the bolt catch on the other day, then after fighting that PITA roll pin in, realized I forgot the spring and detent. As far as cutting down the spring, I'd think you should be able to get it with a small set of cutting pliers (they make a really small pair that you should be able to find in any craft store, and maybe Wal-Mart, in the jewelry making section). |
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You're overthinking it a bit.
Needle or pin. Stick inside the side hole and get a little bit of purchase on the pin using the sharp tip. Work it forward. Or, using another detent, see if it is magnetic. If so, rub the needle or pin on a magnet and draw it out. Or, get a cutting board, cover with a towel. Bang the crap out of the Lower until the detent drops out. No need to be gentle. If you're worried about the pivot boss, offset the banging to the lower end of the lower..... |
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I've tried working it forward through that little tiny hole for quite some time and its still not moving.
Just tried a couple ceramic magnets with a magnetized allen wrench slid in there and its still not moving. I'm about ready to use a grenade if this little mother doesn't budge. |
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If you can never get it out (I like the magnetized paper clip idea), perhaps you could get a new detent to put over the spring after shortening it by one detent length and put it all in the hole. ie detent, shortened spring, detent. Just do this and not worry anymore. It will not affect anything. Stop overthinking and go with the flow. How musch is your time worth? |
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I would guess you put the spring on top of the pin and pushed??
There was probably something in the hole like a burr or overgrown anodizing or whatever. I generally clean the holes then run an appropriately sized drill bit into the hole to make sure they are GTG. I would try heating the area up a lot and try working it out again. KNS makes a push button pin that does not use the spring and detent. |
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My local armorer suggested an AR specialist in the area.
Huge magnet and compressed air would not move this pin that basically consumed my entire Sunday. Thanks for the suggestions and wish me luck, I emailed the weapons guy and will see what he can do. It seems like such a simple task but "Murphy's Law" has ways of getting to me. |
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I've never had that happen. But I'd just tap that detent all the way in the hole as far as it will go. Take the spring and cut off just about the same length of the pin ( go buy a side cutter , don't use a pliers ! ) Put in your shortened spring and then a new detent.
No need to over think it. Once the pivot pin is in there. It's not like you will be taking it out. 
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Holy Shit! I got it out.
One more attempt with the compressed air, I put the rubber tip on the drain hole and held it down and squeezed it. That little pin shot out of there into a towel like a little cannon. Assembled the pin and that lower fits nice and snug onto my upper, I'm a very happy man. Apparently it just needed some additional encouragement, as I did also. My patience is improving as I get older, thanks guys. |
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Quoted:
I have tried tapping it with a small rubber mallet and its been squirted with penetrating oil (Kroil) and its still not moving. I can visibly see it in the drain hole and it doesn't appear to want to move at all. This is really driving me completely insane, how can the very last little part totally kick my ass and literally trash the entire build process? Darwin award over here please. I do not even know what my next move is but I have a real nice looking paperweight. Although a noob mistake, you certainly are not eligible for a Darwin Award. Here is what it takes for a Darwin Award: The Darwin Awards commemorate individuals who protect our gene pool by making the ultimate sacrifice of their own lives: by eliminating themselves in an extraordinarily idiotic manner, thereby improving our species' chance of long-term survival. In other words, they are cautionary tales about people who kill themselves in really stupid ways, and in doing so, significantly improve the gene pool by eliminating themselves from the human race. Glad you got it fixed. |
Did the same thing the other day  . Just tapped on it a few times and it dropped fine.
My newbie mistake was on my second lower build. Put it all together, got the bugs worked out and finally got it shooting/ejecting and it was stuck with no trigger reset. Checked it out after getting pissed enough and it was the disconnecter spring 
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Well I'm still proud of myself as the rookie stripes will be wearing off one at a time. My Next lower is going to have a shorter barrel ( I hope)  Addicting it is . My first was a complete rifle bought, second was a stripped lower and complete upper, third was stripped upper and stripped lower. The cycle is a hard one to break
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