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Posted: 11/22/2011 7:32:35 AM EDT
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Staring at this SP-1 upper & my NDS-43s & pondering.
What else would I need to do, besides, remove the windage mark & flashing to make it a proper 601 profile? I've read Victor does this Mod, is it really that difficult I'd have to outsource it? Also, Did the 601 originally have the hole drilled for the port door spring? I've never seen the real deal in person so I've nothing to go on except photos. |
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I would start with an in the white nds 604 to mod over cutting up a SP1
remove the windage marks and the forging flash, reprofile the area above the charging handle, drill the hole for the ejection port door, reprofile the area below the ejection port so it matches up with the mag well and apply the appropriate colored finish.. if you do the mods to a square forge SP1 add an adapter bushing to the list ETA: oh..and if you do mod an SP1 you can also add the knowledge that you destroyed the value of an original Colt part that they haven't made in years 
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I would start with an in the white nds 604 to mod over cutting up a SP1 remove the windage marks and the forging flash, reprofile the area above the charging handle, drill the hole for the ejection port door, reprofile the area below the ejection port so it matches up with the mag well and apply the appropriate colored finish.. if you do the mods to a square forge SP1 add an adapter bushing to the list ETA: oh..and if you do mod an SP1 you can also add the knowledge that you destroyed the value of an original Colt part that they haven't made in years Heat-n-beat bushed the holes front & rear as they where bubba'd when I bought it off the EE. I guess I'll leave it alone, shame because it lines up really nice with the mag well line. Maybe I'll sell it & start from scratch, makes sense to start with a blank slate. |
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I guess I'll leave it alone, shame because it lines up really nice with the mag well line. Very interesting. I have noted this too. My NDS uppers fit well on the NDS lowers but the lines match up better when I put on one of my Colt uppers on an NDS lower. I have had the same thought as the OP about this mod. Yet, since being on this forum in the short time that I have, I see the merit in leaving the originals alone. Anyway, I will be interested to see how your project turns out! |
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I would start with an in the white nds 604 to mod over cutting up a SP1 remove the windage marks and the forging flash, reprofile the area above the charging handle, drill the hole for the ejection port door, reprofile the area below the ejection port so it matches up with the mag well and apply the appropriate colored finish.. if you do the mods to a square forge SP1 add an adapter bushing to the list ETA: oh..and if you do mod an SP1 you can also add the knowledge that you destroyed the value of an original Colt part that they haven't made in years Well, I've got to disagree with you cracked - I think if I had a bubba'd SP1 upper like he does, I'd consider the same thing. I think there comes a point at which older parts are definitely 'fair game'. Without seeing the upper, it's hard for me to disagree with the OP. I think people should have what they want in life, and if done well, and with respect for the part, I guess I don't see a problem. I would hate to see a rash of SP1 to 601 conversions however. There's always someone who's willing to fuck up a good thing to make $3 without a sense of propriety. I guess I know enough about the OP that I know that's not the case. |
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I would start with an in the white nds 604 to mod over cutting up a SP1 remove the windage marks and the forging flash, reprofile the area above the charging handle, drill the hole for the ejection port door, reprofile the area below the ejection port so it matches up with the mag well and apply the appropriate colored finish.. if you do the mods to a square forge SP1 add an adapter bushing to the list ETA: oh..and if you do mod an SP1 you can also add the knowledge that you destroyed the value of an original Colt part that they haven't made in years Well, I've got to disagree with you cracked - I think if I had a bubba'd SP1 upper like he does, I'd consider the same thing. I think there comes a point at which older parts are definitely 'fair game'. Without seeing the upper, it's hard for me to disagree with the OP. I think people should have what they want in life, and if done well, and with respect for the part, I guess I don't see a problem. I would hate to see a rash of SP1 to 601 conversions however. There's always someone who's willing to fuck up a good thing to make $3 without a sense of propriety. I guess I know enough about the OP that I know that's not the case. Morg, he didn't say it was messed up in the original post though....if it's beyond being salvaged as an SP1, then go for it. I just don't think the finite supply of nice original parts should be used for these mods when new commercial stuff can be used to achieve the same end result |
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I would start with an in the white nds 604 to mod over cutting up a SP1 remove the windage marks and the forging flash, reprofile the area above the charging handle, drill the hole for the ejection port door, reprofile the area below the ejection port so it matches up with the mag well and apply the appropriate colored finish.. if you do the mods to a square forge SP1 add an adapter bushing to the list ETA: oh..and if you do mod an SP1 you can also add the knowledge that you destroyed the value of an original Colt part that they haven't made in years Well, I've got to disagree with you cracked - I think if I had a bubba'd SP1 upper like he does, I'd consider the same thing. I think there comes a point at which older parts are definitely 'fair game'. Without seeing the upper, it's hard for me to disagree with the OP. I think people should have what they want in life, and if done well, and with respect for the part, I guess I don't see a problem. I would hate to see a rash of SP1 to 601 conversions however. There's always someone who's willing to fuck up a good thing to make $3 without a sense of propriety. I guess I know enough about the OP that I know that's not the case. Morg, he didn't say it was messed up in the original post though....if it's beyond being salvaged as an SP1, then go for it. I just don't think the finite supply of nice original parts should be used for these mods when new commercial stuff can be used to achieve the same end result Very good point - I agree. I do understand folks wanting the Colt rollmark, or having one rifle the way they want it however. I've considered buying a beater SP1 or SPII for a Mk18 lower - just so it's Colt. I wouldn't use an early S/N, and would look for something well-used, but it's an idea. (Probably a bad one...) |
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I would start with an in the white nds 604 to mod over cutting up a SP1 remove the windage marks and the forging flash, reprofile the area above the charging handle, drill the hole for the ejection port door, reprofile the area below the ejection port so it matches up with the mag well and apply the appropriate colored finish.. if you do the mods to a square forge SP1 add an adapter bushing to the list ETA: oh..and if you do mod an SP1 you can also add the knowledge that you destroyed the value of an original Colt part that they haven't made in years Well, I've got to disagree with you cracked - I think if I had a bubba'd SP1 upper like he does, I'd consider the same thing. I think there comes a point at which older parts are definitely 'fair game'. Without seeing the upper, it's hard for me to disagree with the OP. I think people should have what they want in life, and if done well, and with respect for the part, I guess I don't see a problem. I would hate to see a rash of SP1 to 601 conversions however. There's always someone who's willing to fuck up a good thing to make $3 without a sense of propriety. I guess I know enough about the OP that I know that's not the case. Morg, he didn't say it was messed up in the original post though....if it's beyond being salvaged as an SP1, then go for it. I just don't think the finite supply of nice original parts should be used for these mods when new commercial stuff can be used to achieve the same end result Very good point - I agree. I do understand folks wanting the Colt rollmark, or having one rifle the way they want it however. I've considered buying a beater SP1 or SPII for a Mk18 lower - just so it's Colt. I wouldn't use an early S/N, and would look for something well-used, but it's an idea. (Probably a bad one...) But why? The Pony/AR15 mark vs. large pivot pin and no mag fence? |
| Use the SP-1 until you can find the real McCoy. Last two 01 receivers I've seen for sale brought less than $200 ea this year. Definately not in the same price range as say an 02 receiver. The furniture on the otherhand is a totally different ballgame. The NDS is a grand idea. After engraving and machining almost bet an expert couldn't tell the difference except for the aging differences. |
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The SP-1 in question is the one I asked about a few months back, Crackedcornish posted pictures to help me identify what I had.
As stated above, the pin holes looked like someone attempted to elongate the holes (poorly) H-n-B did a bang up job putting bushings in, front & back now take regular sized pins. Morg your correct, I'd rather spend the money on getting it done right then being classified as "that Guy"––––––> 
Personally I think the hardest part would be reprofiling the CH area without a 601 CH in hand. |
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The SP-1 in question is the one I asked about a few months back, Crackedcornish posted pictures to help me identify what I had. As stated above, the pin holes looked like someone attempted to elongate the holes (poorly) H-n-B did a bang up job putting bushings in, front & back now take regular sized pins. Morg your correct, I'd rather spend the money on getting it done right then being classified as "that Guy"––––––>
Personally I think the hardest part would be reprofiling the CH area without a 601 CH in hand. If you go this route,I can (and I've done it before for other members) take pics,and give you a basic tutorial with measurments for getting the CH area real,real close to the original 601 and 602 uppers I have. It's easy,but like anything else worthwhile,just takes some patience. I can also give you the measured location for the tiny hole for the port door spring,and the size drill bit needed. 
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The SP-1 in question is the one I asked about a few months back, Crackedcornish posted pictures to help me identify what I had. As stated above, the pin holes looked like someone attempted to elongate the holes (poorly) H-n-B did a bang up job putting bushings in, front & back now take regular sized pins. Morg your correct, I'd rather spend the money on getting it done right then being classified as "that Guy"––––––>
Personally I think the hardest part would be reprofiling the CH area without a 601 CH in hand. If you go this route,I can (and I've done it before for other members) take pics,and give you a basic tutorial with measurments for getting the CH area real,real close to the original 601 and 602 uppers I have. It's easy,but like anything else worthwhile,just takes some patience. I can also give you the measured location for the tiny hole for the port door spring,and the size drill bit needed.
Any & all help is excepted & greatly appreciated. (Surprised no one has posted a tutorial on this.) |
I actually did in replies to posts,,2 or 3 times about a year ago. I don't save pics in my photobucket for too long,so when those membvers were done with the info,I deleted my pics.
ETA,I'll be breaking down my 602 very soon for my final AR upgrade and will show you what I did when I reprofiled a 604 for another member. |
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I would start with an in the white nds 604 to mod over cutting up a SP1 remove the windage marks and the forging flash, reprofile the area above the charging handle, drill the hole for the ejection port door, reprofile the area below the ejection port so it matches up with the mag well and apply the appropriate colored finish.. if you do the mods to a square forge SP1 add an adapter bushing to the list ETA: oh..and if you do mod an SP1 you can also add the knowledge that you destroyed the value of an original Colt part that they haven't made in years Well, I've got to disagree with you cracked - I think if I had a bubba'd SP1 upper like he does, I'd consider the same thing. I think there comes a point at which older parts are definitely 'fair game'. Without seeing the upper, it's hard for me to disagree with the OP. I think people should have what they want in life, and if done well, and with respect for the part, I guess I don't see a problem. I would hate to see a rash of SP1 to 601 conversions however. There's always someone who's willing to fuck up a good thing to make $3 without a sense of propriety. I guess I know enough about the OP that I know that's not the case. Morg, he didn't say it was messed up in the original post though....if it's beyond being salvaged as an SP1, then go for it. I just don't think the finite supply of nice original parts should be used for these mods when new commercial stuff can be used to achieve the same end result Very good point - I agree. I do understand folks wanting the Colt rollmark, or having one rifle the way they want it however. I've considered buying a beater SP1 or SPII for a Mk18 lower - just so it's Colt. I wouldn't use an early S/N, and would look for something well-used, but it's an idea. (Probably a bad one...) But why? The Pony/AR15 mark vs. large pivot pin and no mag fence? Well, that's a good point where the SP1 is concerned, but a Colt sporter? Olgunner has one and it has the mag fence - I wouldn't feel at all bad about such a build since it has no historical relevance or importance. I would think some bushings in the front pin area would allow you to run a regular upper and regular pin. I will likely just stay with NDS lowers however. I was going to order one of the blems but found a deal on a 933 upper instead that I couldn't pass on. Oops - did I say 933?  If there's one thing about BRD, it's that it seems to have no boundaries.
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