Faulty detent opening for rear takedown pin?

AR/M4 AR Technical Discussion
1

So I was trying to install the rear takedown pin assembly and I’m having an issue with the pin “catching” the detent. It appears that the detent isn’t going through all the way and it looks stuck on the opening. Any ideas why? Do I need to just file the opening a bit more?

Mag tactical lower
PSA lower parts kit

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2

Use a drill bit, WITHOUT a drill, and twist it to remove debris impeding the detent pin.

3

Good idea, I’ll try that. Thanks

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4

That worked! Thanks! Admins feel free to delete or lock thread

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