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Test Polymer AR 15-22


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Old 08-15-2015, 02:13 PM   #21
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Most of my ammo is CCI MM ,green lable and standard in 100 count boxes and they are a bit better than the Tactical. But I shoot lots of rounds with this AR and the Tactical are a bit cheaper to shoot. And wow with the way they shoot in this weapon...I have nothing but praise.
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Old 08-15-2015, 07:13 PM   #22
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Sounds like you have found the ammo your rifle favours. Nice when the rifle picks something thats easy on the wallet.
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Old 02-16-2016, 03:02 PM   #23
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Just a quick update 15,000 rounds to date. I had one problem that has occurred. One of the roll pins in the bolt has come loose and after about 100 rounds or so I have to remove the bolt and drive it back in or the pin starts hitting the inside of the receiver and starts making an odd noise. You can see the pin in post #16 the lower rear, it was working its way out then. It does not move much there but just enough to make an odd noise.

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Old 03-05-2017, 05:57 PM   #24
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I was working on my second build and made a handguard change. So I decided to put the BC KMR free floating hg on this weapon and while I was at it I installed a AR scope mount. The hand guard that came on the upper was very heavy and the BC handguard helped reduced the weight and made the balance better.
And update that I have fired 18,000 rounds and no problems.
File Type: jpg 20170305_124258.jpg (60.9 KB, 32 views)

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Old 03-13-2017, 09:33 PM   #25
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Bad news I was cleaning the Ar after a day shooting and noticed that the front pivot on the upper was cracked. I took the upper all the way off the lower and half of the pivot broke off.
Looks like I found a weak point on the polymer upper.
I have an extra forged aluminium upper that I will replace this one with.
File Type: jpg 20170313_162504.jpg (66.2 KB, 28 views)

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Old 03-14-2017, 04:00 AM   #26
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Sorry to hear the Jammer. My poly upper/lower build still going strong after 30K rds, but it's just a 22lr. No where near the stresses of 556. And with the stainless bolt group I put in I don't take it down to clean as much as I should...
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Old 03-22-2017, 03:25 PM   #27
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I have reassemble this weapon rusing a RockRiver forged aluminium upper.
And tested it for function and accuracy. Everything is working flawlessly. Using Federal match auto, Remington golden bullet, and CCI AR.
File Type: jpg 20170319_152054.jpg (148.5 KB, 22 views)
File Type: jpg 20170319_144512.jpg (220.1 KB, 22 views)

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Old 03-26-2017, 05:43 PM   #28
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First version Chiappa .22 uppers were problematic. Saw 2 that would not run.
Eventually they did, but it was beyond "break in". There was a fair bit of rework needed to make them function.
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Old 04-25-2017, 12:55 AM   #29
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One thing that I have seen on a rental AR 22 LR with the Chiappa, was the weapon had been dry fired so many times that the firing pin had made a lip at the top of the chamber. This would catch some of the rounds and keep them from going into the chamber. A quick touch with a gringing stone fixed that problem.
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