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[ARCHIVED THREAD] - Colt piston upper?

Posted: 8/13/2017 12:24:43 PM EDT

I purchased a NOS Colt piston stripped upper receiver the other day. Have any of you used them for a build before? I do not have it in my hands yet, but was wondering if it will still require the bushing where the piston comes through?

[ARCHIVED THREAD] - Colt piston upper?

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