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The Range
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AR Help Please
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<blockquote data-quote="kahrk-9" data-source="post: 3846833" data-attributes="member: 1429"><p>Thanks in advance.</p><p>I bought a lower and added a 9mm conversation to it, ran some mags; all good. </p><p>Added a can ran some mags; all good.</p><p>Next trip I start having FTF on last round.</p><p>Disassembled, cleaned lubed different mags and it gets steadily worse until it won’t even feed half the time. I send off the 9mm conversation for warranty and get a different upper in 5.56. </p><p>Go to the range and it won’t feed off multiple mags.</p><p>Go home and try two other uppers with safety rounds and have the same result. </p><p>I put the second upper mentioned (556) on a different lower and it feeds the safety rounds.</p><p>It seems the issue is the lower but am hoping you can tell me how to troubleshoot. I’m thinking measure the height of the ammo sticking up from the receiver against other receivers. If that’s the issue I’m thinking maybe mag release or receiver itself. </p><p></p><p>Please tell me there is a simple fix.</p></blockquote><p></p>
[QUOTE="kahrk-9, post: 3846833, member: 1429"] Thanks in advance. I bought a lower and added a 9mm conversation to it, ran some mags; all good. Added a can ran some mags; all good. Next trip I start having FTF on last round. Disassembled, cleaned lubed different mags and it gets steadily worse until it won’t even feed half the time. I send off the 9mm conversation for warranty and get a different upper in 5.56. Go to the range and it won’t feed off multiple mags. Go home and try two other uppers with safety rounds and have the same result. I put the second upper mentioned (556) on a different lower and it feeds the safety rounds. It seems the issue is the lower but am hoping you can tell me how to troubleshoot. I’m thinking measure the height of the ammo sticking up from the receiver against other receivers. If that’s the issue I’m thinking maybe mag release or receiver itself. Please tell me there is a simple fix. [/QUOTE]
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