Paladin's Flat top conversion - Chicagoland Sportbikes
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post #1 of 7 (permalink) Old 03-29-2008, 09:15 AM Thread Starter
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Paladin's Flat top conversion

Started as a Colt A2 HBAR

Retained the barrel, bolt carrier group.

Added a RRA A3 upper and free floated the barrel. No b4 pics, just after.

His upper, my lower.


Spare parts in this pic shown as well.



Stamping:



A little fitting to make the parts work together:




Kirk, I have a few other parts you may want like the bipod.

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post #2 of 7 (permalink) Old 03-29-2008, 11:45 AM
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Looks good I have a Harris for it I am happy to see it has the lug.

Looks very good can not wait to get it.

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post #3 of 7 (permalink) Old 03-30-2008, 05:52 PM
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Just how much of a PITA is it to switch over from a A2 to flattop? Barrel removal a problem?
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post #4 of 7 (permalink) Old 03-30-2008, 08:03 PM
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Originally Posted by YZFRob View Post
Just how much of a PITA is it to switch over from a A2 to flattop? Barrel removal a problem?
No trouble just get a hold of ponch to do it.

here is a link see for yourself.

http://www.ar15.com/forums/topic.html?b=3&f=4&t=226782

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post #5 of 7 (permalink) Old 03-31-2008, 09:52 AM Thread Starter
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If you have th etools maybe a 20 minute job.
Need the upper reciever block ($45), a good vise ($120), strap wrench ($20), action wrench ($30), torque wrench ($220). So about $350+ worth of tools.A novice could buy lower quaility stuff to get by, but why invest the $ into something you will only use 1 time.The step by step shows the process. I clean, degrease then relube everything b4 I put it back together.

On this build the FF tbe was a hair longer than the barrel would allow so I had to shave down the FSB to clear it. That's the 3rd pic. Also, the bolt headspaces on the barel extension so you wana be able o check that as well. Not all upper recievers are the same so headspace may change a bit.

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post #6 of 7 (permalink) Old 03-31-2008, 10:13 AM
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Awesome work!

I looked into doing that myself a few years ago...it kinda scared me from wanting to do it because of all the tools, and chances are I'd only do it once. I've never work with gaslines etc.

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post #7 of 7 (permalink) Old 03-31-2008, 10:23 AM
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Exelent job! Ponch does exelent work (from what others have told me) and is an exelent resource for info.

Craig

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