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Old 08-20-2009, 03:37 AM   #11
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I just bought a lower receiver vise block, A3 upper and charging handle along with a tac-latch for the charging handle. I got the tac latch because I am unsure of what type of optic I will use and want to make sure if I go with a larger scope, I can operate the handle.

I attached the A3 upper at the pivot pin but can't remove the takedown pin. Do I need to take the stock off and remove the takedown detent and spring to remove this pin?

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Old 08-20-2009, 04:34 AM   #12
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The takedown pin should push out just like the pivot pin does.

-Fred

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Old 08-20-2009, 08:15 PM   #13
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Should it push out with the detent and spring in? I am afraid to force it with something as forceful as a punch.

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Old 08-20-2009, 08:19 PM   #14
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Quote:
Originally Posted by NitroxAZ View Post
Should it push out with the detent and spring in? I am afraid to force it with something as forceful as a punch.
The spring pushes the detent into the pin, adding resistance, so the pin doesn't come all the way out.

Correctly installed, the detent should be riding in the groove of the pin, and it should be a little difficult to get out, that is how you know you have a good, tight fit between the upper and the lower.

JD
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Old 08-20-2009, 11:01 PM   #15
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Figured it out. Had the takedown pin installed from the wrong side. Thanks for the help. Here it is put together.




It's getting there. I am going to get the bolt carrier group tomorrow.

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Old 08-21-2009, 04:20 AM   #16
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Smart choice on the A3 Upper, I wish mine was an A3, I'm thinking about changing it out. Get's kind of annoying not being able to mount any sort of optics to it.

-Fred

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Old 08-22-2009, 06:26 PM   #17
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Did my first build earlier this year. I must have launched the detent and spring for the front takedown pin across the room 4 or 5 times before I finally got it. Very frustrating, but a good learning experience. I bought my upper complete, but kind of wish I'd have assembled it myself as well. Maybe next time. I think assembling the lower can be a bit intimidating the first time, but once you've done it once, it's really pretty easy.

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Old 08-24-2009, 05:41 PM   #18
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Purchased and installed the bolt carrier group this weekend. I am getting there. Looking at the barrel next. I can't wait until this is complete and I can take it tot he range.

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Old 09-08-2009, 08:29 PM   #19
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Just ordered the gas system kit from Midway. I will be getting the barrel Friday. Just need the handguard and sights/optics.

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Old 10-04-2009, 10:35 PM   #20
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Update? Pics?

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