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Rifles, Reloading, Optics, Equipment
AR15/10 Rifles
Thread time and twist
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<blockquote data-quote="bamban" data-source="post: 2844416" data-attributes="member: 17722"><p>Chamber the barrel, mark barrel where the pin lines up, remove barrel extension.</p><p></p><p>Make a collar to bottom out on the tenon shoulder. Preferably, the end would be solid with just a hole drilled for your rigid shaft bore scope shaft to pass through.</p><p></p><p>Calculate where your port needs to be relative to tenon shoulder.</p><p></p><p>Make a stop collar for the borescope shaft.</p><p></p><p>Taking into consideration the length of the tenon collar, lock the borescope collar to the shaft so when you slide it into the tenon collar hole, the shaft collar will bottom out to your calculated distance from the tenon shoulder to the gas port centered to the LED view.</p><p></p><p>Mark the borescope shaft where the LED is orientated.</p><p></p><p>Now, rotate the chuck till you see the bottom, actually the top of the groove.</p><p></p><p>Mark the barrel where angular location is from previous step.</p><p></p><p>Screw the barrel extension on, make small cuts on the tenon shoulder, if need be, to align the pin to the barrel mark.</p><p></p><p>Final finish headspace, however you do it.</p><p></p><p>Drill gas port timed to pin.</p></blockquote><p></p>
[QUOTE="bamban, post: 2844416, member: 17722"] Chamber the barrel, mark barrel where the pin lines up, remove barrel extension. Make a collar to bottom out on the tenon shoulder. Preferably, the end would be solid with just a hole drilled for your rigid shaft bore scope shaft to pass through. Calculate where your port needs to be relative to tenon shoulder. Make a stop collar for the borescope shaft. Taking into consideration the length of the tenon collar, lock the borescope collar to the shaft so when you slide it into the tenon collar hole, the shaft collar will bottom out to your calculated distance from the tenon shoulder to the gas port centered to the LED view. Mark the borescope shaft where the LED is orientated. Now, rotate the chuck till you see the bottom, actually the top of the groove. Mark the barrel where angular location is from previous step. Screw the barrel extension on, make small cuts on the tenon shoulder, if need be, to align the pin to the barrel mark. Final finish headspace, however you do it. Drill gas port timed to pin. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
AR15/10 Rifles
Thread time and twist
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