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Rifles, Reloading, Optics, Equipment
AR15/10 Rifles
Looking for an AR-15 expert, intermittent feed issue
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<blockquote data-quote="cohunt" data-source="post: 2496317" data-attributes="member: 94491"><p>As far as magazines go--- one thing to look at is the "protrusion" of the mag/rounds above the top of the lower receiver. </p><p></p><p>If you take you upper off of the lower and then insert a loaded mag into just the lower-- you can measure the protrusion height of the mag and rounds--- </p><p></p><p>This is more along the lines of failure to pick up a round, but it also jas an effect on how much pressure the rounds put on the bottom of the bolt carrier.</p><p></p><p>There are tolerances allowed for mag catch height, mag catch dimentions' mag catch hole in side of mag, etc--' you may have some "tolerance stacking" going on due to variances </p><p></p><p></p><p>You be surprised at the variances in things like bolt catch height, mag height in lower, feed lip angles etc that can affect how the platform runs.</p></blockquote><p></p>
[QUOTE="cohunt, post: 2496317, member: 94491"] As far as magazines go--- one thing to look at is the "protrusion" of the mag/rounds above the top of the lower receiver. If you take you upper off of the lower and then insert a loaded mag into just the lower-- you can measure the protrusion height of the mag and rounds--- This is more along the lines of failure to pick up a round, but it also jas an effect on how much pressure the rounds put on the bottom of the bolt carrier. There are tolerances allowed for mag catch height, mag catch dimentions' mag catch hole in side of mag, etc--' you may have some "tolerance stacking" going on due to variances You be surprised at the variances in things like bolt catch height, mag height in lower, feed lip angles etc that can affect how the platform runs. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
AR15/10 Rifles
Looking for an AR-15 expert, intermittent feed issue
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