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The Range
Rifle & Shotgun Discussion
Ar 9mm lowers
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<blockquote data-quote="Shadowrider" data-source="post: 2940737" data-attributes="member: 3099"><p>I'm fairly certain you have to use a PSA upper on their lower. The QC10 lower is the way to go, it'll take mil-spec uppers.</p><p></p><p>One of the caveats with 9mm AR's is the trigger. I just bought a Geissele Rapid Fire for my QC10 build. I doesn't work with 9mm bolts due to the ramp being a bit different. That's nothing to do with the lower, it passes function check with flying colors, but with the upper in place I have a single shot. Some folks have a full auto so if you go aftermarket trigger make damn sure it works in 9mm carbines, otherwise just stay with mil-spec LPKs.</p></blockquote><p></p>
[QUOTE="Shadowrider, post: 2940737, member: 3099"] I'm fairly certain you have to use a PSA upper on their lower. The QC10 lower is the way to go, it'll take mil-spec uppers. One of the caveats with 9mm AR's is the trigger. I just bought a Geissele Rapid Fire for my QC10 build. I doesn't work with 9mm bolts due to the ramp being a bit different. That's nothing to do with the lower, it passes function check with flying colors, but with the upper in place I have a single shot. Some folks have a full auto so if you go aftermarket trigger make damn sure it works in 9mm carbines, otherwise just stay with mil-spec LPKs. [/QUOTE]
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