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If you slowly close the upper to the lower can you see the carrier push on the buffer, moving it into the tube? Because you should.
Or if you have both pins out and you put the upper on the lower you should be able to feel the buffer spring try to push the upper forward. |
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Quoted: If you slowly close the upper to the lower can you see the carrier push on the buffer, moving it into the tube? Because you should. Or if you have both pins out and you put the upper on the lower you should be able to feel the buffer spring try to push the upper forward. View Quote yes, this happens. |
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It's from the bolt carrier not being 100% forward when closing it a couple times. No biggie.
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If you slowly close the upper to the lower can you see the carrier push on the buffer, moving it into the tube? Because you should. Or if you have both pins out and you put the upper on the lower you should be able to feel the buffer spring try to push the upper forward. yes, this happens. Well something isn't right. It's not normal. |
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Quoted: Well something isn't right. It's not normal. View Quote View All Quotes View All Quotes Quoted: Quoted: Quoted: If you slowly close the upper to the lower can you see the carrier push on the buffer, moving it into the tube? Because you should. Or if you have both pins out and you put the upper on the lower you should be able to feel the buffer spring try to push the upper forward. yes, this happens. Well something isn't right. It's not normal. |
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Quoted:
It's from the bolt carrier not being 100% forward when closing it a couple times. No biggie. View Quote Is that really a thing? It looks like the buffer is making contact with the pin. I have an AR right here and I tried positioning the carrier as you described and slowly seeing the interference. It's not easy getting the carrier just right even when trying, then it would have to be slammed and forced shut. Repeatedly. OP did you slam and force the upper and lower together? |
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If you slowly close the upper to the lower can you see the carrier push on the buffer, moving it into the tube? Because you should. Or if you have both pins out and you put the upper on the lower you should be able to feel the buffer spring try to push the upper forward. yes, this happens. Well something isn't right. It's not normal. How would you have offended me? I'm just trying to think of what it could be. The fit makes it sound like it is ok. But the damage shows otherwise. So clearly something isn't right with it. I just don't know what. |
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Quoted: How would you have offended me? I'm just trying to think of what it could be. The fit makes it sound like it is ok. But the damage shows otherwise. So clearly something isn't right with it. I just don't know what. View Quote |
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Bolt carrier is too short or bcg is not depressing the the buffer off the buffer retainer when gun is closed. That would mean when the buffer comes forward from the recoil it is hitting the buffer retainer causing those marks instead of coming to rest on the rear of the bolt carrier.
If it is an out of spec bolt carrier, replace it. If it is from The retainer pin hitting the buffer, get a new lower. The retainer pin channel is drilled to far to the rear. Edit to add. Pin the front pin and slowly close the rifle in the rear. Watch the bcg. If the bcg pushes the buffer off the buffer retaining pin as you close it, then it is not an out of spec lower. |
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Quoted: Graphic safety violator images! Trigger warning! View Quote View All Quotes View All Quotes Quoted: Quoted: http://i.imgur.com/Oug9pys.jpg?1 http://i.imgur.com/8hKyk2c.jpg?2 http://i.imgur.com/t90mU0E.jpg?2 http://i.imgur.com/0J8pNRL.jpg?2 http://i.imgur.com/suhwmmO.jpg?2 http://i.imgur.com/IVDUl2Q.jpg?1 http://i.imgur.com/PLeBknT.jpg?1 http://i.imgur.com/MjBiNZC.jpg?1 http://i.imgur.com/Kvwo190.jpg?1 http://i.imgur.com/ponSh54.jpg?1 http://i.imgur.com/7uFEj9j.jpg?1 http://i.imgur.com/HdJ9ayA.jpg?1 Graphic safety violator images! Trigger warning! |
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With a nice fat mushroom head. |
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I'm gonna guess it ingested a foreign object that bounced around a couple of times.
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http://<a href=http://img.photobucket.com/albums/v494/harv24/IMG_1212.jpg</a>" /> If you don't have OCD... and actually shoot your rifle more then 100 rds a year, they do actually wear thru use.. That buffer has 12K thru it, and its was build in 1993. It still works and is in the rifle... That is normal wear... Funny, before the internet, we just went out and shot our guns and never thought to look at every square inch of it to see if "that is normal.. View Quote Happy switch? |
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http://<a href=http://img.photobucket.com/albums/v494/harv24/IMG_1212.jpg</a>" /> If you don't have OCD... and actually shoot your rifle more then 100 rds a year, they do actually wear thru use.. That buffer has 12K thru it, and its was build in 1993. It still works and is in the rifle... That is normal wear... Funny, before the internet, we just went out and shot our guns and never thought to look at every square inch of it to see if "that is normal.. Happy switch? Not with that carrier. Posted Via AR15.Com Mobile |
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Ok. Are you sure you have a carbine recoil spring?
Not sarcasm. I have never seen this in over 30 years. |
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Quoted: Not with that carrier. Posted Via AR15.Com Mobile View Quote View All Quotes View All Quotes Quoted: Quoted: Quoted: http://<a href=http://img.photobucket.com/albums/v494/harv24/IMG_1212.jpg</a>" /> If you don't have OCD... and actually shoot your rifle more then 100 rds a year, they do actually wear thru use.. That buffer has 12K thru it, and its was build in 1993. It still works and is in the rifle... That is normal wear... Funny, before the internet, we just went out and shot our guns and never thought to look at every square inch of it to see if "that is normal.. Happy switch? Not with that carrier. Posted Via AR15.Com Mobile |
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Quoted: http://<a href=http://img.photobucket.com/albums/v494/harv24/IMG_1212.jpg</a>" /> If you don't have OCD... and actually shoot your rifle more then 100 rds a year, they do actually wear thru use.. That buffer has 12K thru it, and its was build in 1993. It still works and is in the rifle... That is normal wear... Funny, before the internet, we just went out and shot our guns and never thought to look at every square inch of it to see if "that is normal.. View Quote |
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Quoted: First thing I thought of, change out the buffer spring and run a H2 buffer View Quote View All Quotes View All Quotes Quoted: Quoted: Ok. Are you sure you have a carbine recoil spring? Not sarcasm. I have never seen this in over 30 years. First thing I thought of, change out the buffer spring and run a H2 buffer |
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http://<a href=http://img.photobucket.com/albums/v494/harv24/IMG_1212.jpg</a>" /> If you don't have OCD... and actually shoot your rifle more then 100 rds a year, they do actually wear thru use.. That buffer has 12K thru it, and its was build in 1993. It still works and is in the rifle... That is normal wear... Funny, before the internet, we just went out and shot our guns and never thought to look at every square inch of it to see if "that is normal.. You should here my "Grumpy old Man" Voice. Seriously, that is not Full auto.. that is just normal use...Moving metal parts are going to wear... Thats how this works... Unless you slather every last piece of you gun in oil, shit is going to wear... you should see the gas key on my Bolt carrier, you would have a seizure... |
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Quoted: You should here my "Grumpy old Man" Voice. Seriously, that is not Full auto.. that is just normal use...Moving metal parts are going to wear... Thats how this works... Unless you slather every last piece of you gun in oil, shit is going to wear... you should see the gas key on my Bolt carrier, you would have a seizure... View Quote View All Quotes View All Quotes Quoted: Quoted: Quoted: http://<a href=http://img.photobucket.com/albums/v494/harv24/IMG_1212.jpg</a>" /> If you don't have OCD... and actually shoot your rifle more then 100 rds a year, they do actually wear thru use.. That buffer has 12K thru it, and its was build in 1993. It still works and is in the rifle... That is normal wear... Funny, before the internet, we just went out and shot our guns and never thought to look at every square inch of it to see if "that is normal.. You should here my "Grumpy old Man" Voice. Seriously, that is not Full auto.. that is just normal use...Moving metal parts are going to wear... Thats how this works... Unless you slather every last piece of you gun in oil, shit is going to wear... you should see the gas key on my Bolt carrier, you would have a seizure... I brought this up because it didnt look normal to me. I am a proponent of regularly scheduled maintenance, whether that be at 20 rounds or 2000. Having an issue with your gear and not diagnosing it or fixing it is irresponsible and stupid. Now Im sure you can understand that. ETA: I never said it was full auto fire. I stated that the carrier was full auto profile and that it would work fine with a full auto lower. |
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ETA: I never said it was full auto fire. I stated that the carrier was full auto profile and that it would work fine with a full auto lower. View Quote The "not with that carrier" comment looked like the poster was commenting on the 12k round carrier & buffer, not with yours. The carrier in that image is one of the half circle carriers, produced in a time when Colt was apparently assuming everyone was illegally converting their ARs to full auto. Sear blocks and oversized FCG pins in the lower were part of that design philosophy, and IIRC also was the reasoning behind the larger front screw instead of a takedown pin on the SP1. That's my spitball understanding of the design differences, though, so there may be inaccuracies. |
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From a Mod in tech:
Quoted: http://i81.photobucket.com/albums/j226/Dano523/bufferfacemarkedup.gif?t=1241927061 # 1 is buffer retainer tagging the buffer from the buffer pin channel being too far back in the lower receiver. With over 200 rounds on the buffer, if the buffer was not being pushed back way from the buffer retaining pin when the upper is locked down by the back of the carrier, the denting would be around 200 dents instead. So again, what I am seeing is just the buffer retainer pin coming up and mar'g the buffer edge when the buffer is remove and reinstalled, or the buffer pushed back and allowed to spring forward hard with the upper open to really tag the hell out of the buffer retaining pin instead. FYI, #2 is ridges around the back of the carrier. #3 is a bur on the back of the carrier at the bottom U slot that is scrapping down the face of the tube when the upper it being locked home. And yes, the buffer was produced out the wrong aluminum that was too soft to begin with, and the reason that is all peen to hell very easily to begin with. Quick guide to aluminum, http://www.onlinemetals.com/productguides/aluminumguide.cfm |
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Quoted: http://<a href=http://img.photobucket.com/albums/v494/harv24/IMG_1212.jpg</a>" /> If you don't have OCD... and actually shoot your rifle more then 100 rds a year, they do actually wear thru use.. That buffer has 12K thru it, and its was build in 1993. It still works and is in the rifle... That is normal wear... Funny, before the internet, we just went out and shot our guns and never thought to look at every square inch of it to see if "that is normal.. View Quote I'm with you. Parts do actually wear thru use. No need to obsess about wear on a $20 part. |
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Quoted: I'm with you. Parts do actually wear thru use. No need to obsess about wear on a $20 part. https://s-media-cache-ak0.pinimg.com/236x/25/cd/9d/25cd9df1629eb14e259549b4a79b1edd.jpg View Quote View All Quotes View All Quotes Quoted: Quoted: http://<a href=http://img.photobucket.com/albums/v494/harv24/IMG_1212.jpg</a>" /> If you don't have OCD... and actually shoot your rifle more then 100 rds a year, they do actually wear thru use.. That buffer has 12K thru it, and its was build in 1993. It still works and is in the rifle... That is normal wear... Funny, before the internet, we just went out and shot our guns and never thought to look at every square inch of it to see if "that is normal.. I'm with you. Parts do actually wear thru use. No need to obsess about wear on a $20 part. https://s-media-cache-ak0.pinimg.com/236x/25/cd/9d/25cd9df1629eb14e259549b4a79b1edd.jpg |
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Mine hasn't couple of those as well. I'm assuming it's from when I left the bolt locked back and removed the upper and the buffer slammed into the pin. I wouldn't worry about it.
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Quoted: OMG look at this gas key... http://<a href=http://img.photobucket.com/albums/v494/harv24/IMG_2580_zps9ylposmq.jpg</a>" /> http://<a href=http://img.photobucket.com/albums/v494/harv24/IMG_2587%20-%20Copy_zpscvicsqd1.jpg</a>" /> Look at that hammer... http://<a href=http://img.photobucket.com/albums/v494/harv24/IMG_2581_zpsrnzpdet8.jpg</a>" /> http://<a href=http://img.photobucket.com/albums/v494/harv24/IMG_2582%20-%20Copy_zpscsgoxrqn.jpg</a>" /> I can't believe this thing still works... View Quote |
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From a Mod in tech: Quoted:
http://i81.photobucket.com/albums/j226/Dano523/bufferfacemarkedup.gif?t=1241927061 # 1 is buffer retainer tagging the buffer from the buffer pin channel being too far back in the lower receiver. With over 200 rounds on the buffer, if the buffer was not being pushed back way from the buffer retaining pin when the upper is locked down by the back of the carrier, the denting would be around 200 dents instead. So again, what I am seeing is just the buffer retainer pin coming up and mar'g the buffer edge when the buffer is remove and reinstalled, or the buffer pushed back and allowed to spring forward hard with the upper open to really tag the hell out of the buffer retaining pin instead. FYI, #2 is ridges around the back of the carrier. #3 is a bur on the back of the carrier at the bottom U slot that is scrapping down the face of the tube when the upper it being locked home. And yes, the buffer was produced out the wrong aluminum that was too soft to begin with, and the reason that is all peen to hell very easily to begin with. Quick guide to aluminum, http://www.onlinemetals.com/productguides/aluminumguide.cfm View Quote I guess you could remove and reinstall the buffer and see if you get another mark. To me they look kind of deep for a scratch. |
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