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The Range
Rifle & Shotgun Discussion
AR being uncooperative
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<blockquote data-quote="Perplexed" data-source="post: 3005293" data-attributes="member: 7157"><p>With the goal of building an AR in 5.56 that had a very mild recoil, I put together one with an 18" barrel with a Wylde chamber, rifle-length gas, and a 1:7 twist. I can't recall who made the barrel, though. I installed a Precision Armaments M4-72 compensator, and used an Aero Precision upper with a WMD NiB bcg, Velocity drop-in trigger with 4 lb pull, and a standard buffer (~2.8 ounces) and spring in a M4 style collapsible stock.</p><p></p><p>I ended up with an AR that indeed had very little recoil, but I ran into a problem. Once in a while the rifle would fire and cycle properly, but about 8 or 9 times out of 10 it would eject the spent round and fail to chamber a new round. I tried Wolf Gold 55-grain .223 FMJ and Champion 62-grain 5.56 FMJ, with several MagPul P-Mag's and 10- and 20-round metal USGI mags. I know the AR is probably short-stroking, which is why I tried a standard buffer and spring, but to no avail. I checked the gas block for proper alignment with the gas port, and it looked good - very little soot evident around the latter. I even tried clipping one coil from the spring, but it made no difference, and after clipping a second coil, the spent Champion 5.56 round was stuck in the chamber and I had to mortar the AR to get it out. I stopped at that point.</p><p></p><p>How does one make <em>sure</em> the gas block and port are aligned properly? Am I looking at having to open the gas port? If so, what's the best way to go about this, or are there other remedies I can try without sacrificing the amount of recoil reduction the AR currently has? TIA.</p></blockquote><p></p>
[QUOTE="Perplexed, post: 3005293, member: 7157"] With the goal of building an AR in 5.56 that had a very mild recoil, I put together one with an 18" barrel with a Wylde chamber, rifle-length gas, and a 1:7 twist. I can't recall who made the barrel, though. I installed a Precision Armaments M4-72 compensator, and used an Aero Precision upper with a WMD NiB bcg, Velocity drop-in trigger with 4 lb pull, and a standard buffer (~2.8 ounces) and spring in a M4 style collapsible stock. I ended up with an AR that indeed had very little recoil, but I ran into a problem. Once in a while the rifle would fire and cycle properly, but about 8 or 9 times out of 10 it would eject the spent round and fail to chamber a new round. I tried Wolf Gold 55-grain .223 FMJ and Champion 62-grain 5.56 FMJ, with several MagPul P-Mag's and 10- and 20-round metal USGI mags. I know the AR is probably short-stroking, which is why I tried a standard buffer and spring, but to no avail. I checked the gas block for proper alignment with the gas port, and it looked good - very little soot evident around the latter. I even tried clipping one coil from the spring, but it made no difference, and after clipping a second coil, the spent Champion 5.56 round was stuck in the chamber and I had to mortar the AR to get it out. I stopped at that point. How does one make [I]sure[/I] the gas block and port are aligned properly? Am I looking at having to open the gas port? If so, what's the best way to go about this, or are there other remedies I can try without sacrificing the amount of recoil reduction the AR currently has? TIA. [/QUOTE]
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