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The Range
Gunsmithing & Repairs
AR Roll Pin Size Question
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<blockquote data-quote="tRidiot" data-source="post: 2954660" data-attributes="member: 9374"><p>The hammer spring must be placed in such a way that it exerts the most possible force on the trigger pin. For this reason, a lot of people think when installing it that it can't go that way, you really have to push down hard on those spring "legs" on top of the trigger pin to get it oriented in the right place to insert the hammer pin.</p><p></p><p>The symptoms you're describing are exactly what happens in this scenario. The hammer spring exerts enough force for the trigger to work fine - for a while. Without that extra pressure, however, over time (usually just a couple hundred rounds or less), the trigger pin will "walk" out of position. You can replace it in the right position and it will happen again in a few more rounds.</p><p></p><p>Here's a good picture of the proper orientation:</p><p></p><p><strong>[Broken External Image]</strong><strong>[Broken External Image]</strong><img src="https://www.okshooters.com/data/MetaMirrorCache/i444.photobucket.com_albums_qq169_bbossman1_ALGACT_2_zpsqem8voqp.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p></blockquote><p></p>
[QUOTE="tRidiot, post: 2954660, member: 9374"] The hammer spring must be placed in such a way that it exerts the most possible force on the trigger pin. For this reason, a lot of people think when installing it that it can't go that way, you really have to push down hard on those spring "legs" on top of the trigger pin to get it oriented in the right place to insert the hammer pin. The symptoms you're describing are exactly what happens in this scenario. The hammer spring exerts enough force for the trigger to work fine - for a while. Without that extra pressure, however, over time (usually just a couple hundred rounds or less), the trigger pin will "walk" out of position. You can replace it in the right position and it will happen again in a few more rounds. Here's a good picture of the proper orientation: [b][Broken External Image][/b][b][Broken External Image][/b][IMG]https://www.okshooters.com/data/MetaMirrorCache/i444.photobucket.com_albums_qq169_bbossman1_ALGACT_2_zpsqem8voqp.jpg[/IMG] [/QUOTE]
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