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Posted: 7/29/2015 4:17:26 PM EDT
Can I make this work with a short front sight post or am I going to need to do some filing? I'm planning on installing an A2 aperture in upper as well. I just want to be able to shoot out to ~50 yards and hit center mass. I have other guns for precision work.
Thanks in advance for answering my dumb question, 
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Posted: 7/29/2015 6:19:01 PM EDT
[#1]
there probably will be enough adjustment to make it work. (Probably) is a huge variable.  I have a removable carry handle and a non F marked front sight and it zero'd, but is about maxed out. |
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Posted: 7/30/2015 7:16:49 AM EDT
[#2]
Thanks for the reply.
I have an A1 front sight post coming along with the A2 rear aperture. Hoping to get it to zero for me. I guess worse case scenario I get to spend an afternoon at the range.
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Posted: 7/30/2015 9:00:50 AM EDT
[#3]
It shouldn't be a problem. I've got a Colt 6922 barrel with the F FSB on an A1 upper and just had to crank the front sight post down a couple turns to zero. The old A1 carbines used a taller front sight post. It's extra height is the same as the extra height of the deck on an F FSB.
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Posted: 7/31/2015 5:36:21 PM EDT
[#4]
I have done exactly what you are describing you want to do. Used a DPMS A1/C7 upper, F marked BCM barrel, and installed an A2 rear sight aperture. Just took a few more turns down on front sight to get zeroed.
Has quickly become one of my favorite rifles to shoot |
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Posted: 7/31/2015 9:55:27 PM EDT
[#5]
Thanks guys.
I'm excited about this build. I've missed shooting irons. I think it's going to be a fun plinker. I got it together this week. I cleaned it today with break cleaner and I'm going to give it a rattle can paint job this weekend. Looking forward to getting it out to the range soon. |
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Posted: 8/1/2015 7:23:14 AM EDT
[#6]
Let's see some pics when your done
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Posted: 8/1/2015 10:22:34 AM EDT
[#7]
Yeah, I've got both an A1/603(bought at a gunshow new in 1980)upper as well as a 1974 SP1 with F marked dimension (in the case of the SP1, it has a new unmarked 6720 Colt pencil barrel. but those have F marked dimensions from what I've gathered) FSB. The A1 is a 11.5" F marked J&T. Zero issues zeroing them.
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Posted: 8/1/2015 5:11:13 PM EDT
[#8]
Quote HistoryQuoted:
Let's see some pics when your done
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