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Posted: 2/7/2013 3:09:49 PM EDT
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My friend and I both have the same model (OTC) with serial numbers very close. I bought mine after his.
While we were out shooting, we noticed a differnce between our bolt carriers. One had an H stamped on it, and the other was thicker on the back. My charging handle was stamped "T" and very well made. The other was unmarked and very rough looking . I have a new Charging handle on order, so I told me I'd give him mine when I receive it. Do the major manufacturers get supplied by different sources? Here's a few pics - http://i483.photobucket.com/albums/rr196/vistula1/P1010421.jpg http://i483.photobucket.com/albums/rr196/vistula1/P1010427.jpg http://i483.photobucket.com/albums/rr196/vistula1/P1010424.jpg |
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Swapping out would not have been a possibility. They were both purchases at the same big box sporting goods store. No, I'm convinced they came from the factory that way. Right, which is why I wrote my above comment. Both were most likely made to Bushmaster standards. While you might find people swapping out Colt BCGs, I can't imagine them doing it for Bushmaster. There isn't the same market. |
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I have two bushmaster AR-15 BCGs circa 1996 and they do not match either of the ones in the photos above.
The two I have match the Colt "SP1" Type Carrier in the photo below. http://home.comcast.net/~ssom003/Guns/AR-15%20Bolts%20Carriers%201.JPG |
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I have two bushmaster AR-15 BCGs circa 1996 and they do not match either of the ones in the photos above. The two I have match the Colt "SP1" Type Carrier in the photo below. http://home.comcast.net/~ssom003/Guns/AR-15%20Bolts%20Carriers%201.JPG Why does Colt have an open carrier end? Is there a benefit? |
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Why does Colt have an open carrier end? Is there a benefit? There is NO BENEFIT at all to a neutered carrier. This. The half moon carrier came after the SP1 type carrier. Its purpose was for clearance around the Colt pinned sear blocks. The half moon carrier started out retaining the SP1 exposed firing pin feature. This allowed the hammer to jam against the firing pin to prevent a slam fire in the event of disconnector failure. This feature was not what the AR rifle was supposed to be and should never have been designed. Sometime after the 1994 AWB Colt switched to a shrouded firing pin but kept the half moon. It should be noted that Colt no longer uses any of these carriers. Colt currently uses M16 carriers made to the standard of the TDP. The other changes were an M16 firing pin instead of an AR15 firing pin and the extractor spring/insert. It is a copper colored spring and black insert for carbines. Not sure about rifles. The fact that some companies continue on with semi auto carriers is retarded. |
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Why does Colt have an open carrier end? Is there a benefit? There is NO BENEFIT at all to a neutered carrier. IIRC, It's so it can't trip an auto sear, DIAS or LL. As Stickman said, no benefit. The LL was setup to work with the Colt Sp1 carrier. |
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I have two bushmaster AR-15 BCGs circa 1996 and they do not match either of the ones in the photos above. The two I have match the Colt "SP1" Type Carrier in the photo below. http://home.comcast.net/~ssom003/Guns/AR-15%20Bolts%20Carriers%201.JPG FYI, "New Colts" don't look like that (now). I'm looking at 2 BCG's from a 6920 and a 6940 that I just bought and they are both M16 BCG's. |
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Is one a FA bcg and the other SA? Can you explain to me what that means? Is there one better than the other? FA = Full Auto. SA = Semi Auto. Both of yours are SA. FA is generally preferred because its a little heavier. pmeater, Bang! I just hit my forehead. Thanks, it must be oldtimers. Thank you |
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Is one a FA bcg and the other SA? Can you explain to me what that means? Is there one better than the other? FA = Full Auto. SA = Semi Auto. Both of yours are SA. FA is generally preferred because its a little heavier. pmeater, Bang! I just hit my forehead. Thanks, it must be oldtimers. Thank you No problem. You spend the amount of time I have recently looking for a BCG for under $300 you learn these things. 
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Swapping out would not have been a possibility. They were both purchases at the same big box sporting goods store. No, I'm convinced they came from the factory that way. Right, which is why I wrote my above comment. Both were most likely made to Bushmaster standards. While you might find people swapping out Colt BCGs, I can't imagine them doing it for Bushmaster. There isn't the same market. Yes, and Colt is aware of that. They paint white dots on their Bolts now. If you buy a new Colt and there is no white dot on it, someone swapped it. |
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Swapping out would not have been a possibility. They were both purchases at the same big box sporting goods store. No, I'm convinced they came from the factory that way. Right, which is why I wrote my above comment. Both were most likely made to Bushmaster standards. While you might find people swapping out Colt BCGs, I can't imagine them doing it for Bushmaster. There isn't the same market. Yes, and Colt is aware of that. They paint white dots on their Bolts now. If you buy a new Colt and there is no white dot on it, someone swapped it. Colt has been marking most of their major components since Vietnam once H&R and GM got M16A1 contracts to distinguish their parts from others. ~Augee |
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The half moon carrier came after the SP1 type carrier. Its purpose was for clearance around the Colt pinned sear blocks. The half moon carrier started out retaining the SP1 exposed firing pin feature. This allowed the hammer to jam against the firing pin to prevent a slam fire in the event of disconnector failure. This feature was not what the AR rifle was supposed to be and should never have been designed. I know this is the accepted theory behind the half moon carrier, and it may actually be the case, but unless I'm missing something obvious, this portion of the carrier doesn't even come close to the location of the sear block, so I have a hard time believing this is the reason Colt cut their carriers this way. I am still running two Colt Sporters with the unshrouded version of these carriers, and occasionally I find myself looking the carriers over and wondering what the hell Colt was thinking, because there is absolutely no apparent reason for this aberration. Colt could have left a full 1" on the tail of the carrier and it still wouldn't extend beyond the rear (takedown) lug, nor into the sear cut out in the upper, so (in my opinion) the sear block can't be the reason for the half moon carrier. Someone please correct me if I'm wrong on this. |
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The half moon carrier came after the SP1 type carrier. Its purpose was for clearance around the Colt pinned sear blocks. The half moon carrier started out retaining the SP1 exposed firing pin feature. This allowed the hammer to jam against the firing pin to prevent a slam fire in the event of disconnector failure. This feature was not what the AR rifle was supposed to be and should never have been designed. I know this is the accepted theory behind the half moon carrier, and it may actually be the case, but unless I'm missing something obvious, this portion of the carrier doesn't even come close to the location of the sear block, so I have a hard time believing this is the reason Colt cut their carriers this way. I am still running two Colt Sporters with the unshrouded version of these carriers, and occasionally I find myself looking the carriers over and wondering what the hell Colt was thinking, because there is absolutely no apparent reason for this aberration. Colt could have left a full 1" on the tail of the carrier and it still wouldn't extend beyond the rear (takedown) lug, nor into the sear cut out in the upper, so (in my opinion) the sear block can't be the reason for the half moon carrier. Someone please correct me if I'm wrong on this. The answer is "Lightning Link" for $1,000. ~Augee |
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The answer is "Lightning Link" for $1,000. ~Augee Yeah, I hadn't even thought of the Lightning Link....that would explain the carrier massacre. 
For some reason my thought process was focused on the sear block and I completely overlooked the obvious. Thanks Augee......will you accept a misspelled IOU, printed in crayon, on a napkin? 
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Yeah, I hadn't even thought of the Lightning Link....that would explain the carrier massacre.
For some reason my thought process was focused on the sear block and I completely overlooked the obvious. Thanks Augee......will you accept a misspelled IOU, printed in crayon, on a napkin?
Only if presented by Alex Trebek.
~Augee |
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