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Posted: 5/26/2015 9:56:31 PM EDT
I put this together several years ago to commemorate my brother-in-law's stint in RVN with the 25th Inf. The upper was complete except for BCG and handguards. Its been long enough that I don't have any idea where or how I got the upper.
Been Googlin on and off but can't find any information on it. I suspect it was a late 70's arsenal upgrade but that's just a gut feeling. Any info appreciated.        
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Posted: 5/26/2015 9:58:43 PM EDT
[#1]
Rapidex knob.
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Posted: 5/26/2015 10:17:07 PM EDT
[#2]
If I recall, it was never an official upgrade or even available in the system. But when A2 sights came out, many people wanted to be able to change windage without using a bullet point and that was the way to give you an M16A1.5
I put one on my AR-100 and didn't have any regrets about it. http://www.midwayusa.com/product/353544/dpms-rear-sight-base-rapidex-windage-knob-ar-15-a1-matte 
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Posted: 5/26/2015 10:56:49 PM EDT
[#3]
L M Martin Marietta replacement upper. Would like to see the port door closed. Can't recall what variation of door it is with that style detent.
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Posted: 5/26/2015 11:15:13 PM EDT
[#4]
Quote HistoryQuoted:
L M Martin Marietta replacement upper. Would like to see the port door closed. Can't recall what variation of door it is with that style detent. that's the sendra one w/ the exposed spring and no pad. folks like to to use it on proto builds as it has that early look to it. |
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Posted: 5/26/2015 11:23:05 PM EDT
[#5]
Quote HistoryQuoted:
L M Martin Marietta replacement upper. Would like to see the port door closed. Can't recall what variation of door it is with that style detent. That's a sendra no-pad. |
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Posted: 5/26/2015 11:26:51 PM EDT
[#6]
I've got one on a PM forge upper I won at an online auction with essential arms lower.
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Posted: 5/27/2015 3:11:11 AM EDT
[#7]
Quote HistoryQuoted:
L M Martin Marietta replacement upper. Would like to see the port door closed. Can't recall what variation of door it is with that style detent. Here it is. 
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Posted: 5/27/2015 10:48:39 AM EDT
[#8]
OP, Thanks for posting.
Yep, Sendra, forgot about that, and I have one in a parts box. 
The C MP C barrel is 1969ish. Does the barrel extension appear chromed? |
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Posted: 5/27/2015 12:09:53 PM EDT
[#9]
Quote HistoryQuoted:
If I recall, it was never an official upgrade or even available in the system. But when A2 sights came out, many people wanted to be able to change windage without using a bullet point and that was the way to give you an M16A1.5 I put one on my AR-100 and didn't have any regrets about it. Is there a "sitting here hoping that this is the gun you are talking about" smiley face? 
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Posted: 5/27/2015 4:51:21 PM EDT
[#10]
Quote HistoryQuoted:
OP, Thanks for posting. Yep, Sendra, forgot about that, and I have one in a parts box.
The C MP C barrel is 1969ish. Does the barrel extension appear chromed? Looks like its chromed. |
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